diff --git a/submission/api.py b/submission/api.py
index 8f08c23..37d424a 100644
--- a/submission/api.py
+++ b/submission/api.py
@@ -17,16 +17,23 @@ from django.db.models import (
     Q,
     Subquery,
 )
+from account.decorators import admin_required
 from prompt.models import Conversation, Message
 
 
 from .schemas import (
+    AwardItemIn,
+    AwardItemManageOut,
+    AwardItemUpdateIn,
+    AwardManageIn,
+    AwardManageOut,
     FlagIn,
     FlagStats,
     AwardOut,
     PromptRoundOut,
     ShowcaseDetailOut,
     ShowcaseItemOut,
+    ShowcaseSubmissionLookupOut,
     SubmissionCountBucket,
     SubmissionFilter,
     SubmissionIn,
@@ -45,6 +52,67 @@ from account.models import RoleChoices, User
 router = Router()
 
 
+def _validate_item_ordering(value: str):
+    if value not in ItemOrdering.values:
+        raise HttpError(400, "无效的作品排序方式")
+
+
+def _award_manage_out(award: Award):
+    return {
+        "id": award.id,
+        "name": award.name,
+        "description": award.description,
+        "sort_order": award.sort_order,
+        "is_active": award.is_active,
+        "item_ordering": award.item_ordering,
+        "item_count": getattr(award, "item_count", None)
+        if getattr(award, "item_count", None) is not None
+        else award.submission_awards.count(),
+    }
+
+
+def _award_item_ordering(award: Award):
+    ordering_map = {
+        ItemOrdering.MANUAL: ("sort_order", "id"),
+        ItemOrdering.AWARDED_AT: ("-awarded_at", "sort_order", "id"),
+        ItemOrdering.SCORE: ("-submission__score", "sort_order", "id"),
+        ItemOrdering.VIEW_COUNT: ("-submission__view_count", "sort_order", "id"),
+    }
+    return ordering_map.get(award.item_ordering, ("sort_order", "id"))
+
+
+def _award_item_manage_out(item: SubmissionAward):
+    has_prompt_chain = getattr(item, "has_prompt_chain", None)
+    if has_prompt_chain is None:
+        has_prompt_chain = Message.objects.filter(
+            submission_id=item.submission_id
+        ).exists()
+    return {
+        "id": item.id,
+        "submission_id": item.submission_id,
+        "username": item.submission.user.username,
+        "task_title": item.submission.task.title,
+        "task_display": item.submission.task.display,
+        "score": item.submission.score,
+        "view_count": item.submission.view_count,
+        "sort_order": item.sort_order,
+        "awarded_at": item.awarded_at,
+        "has_prompt_chain": has_prompt_chain,
+    }
+
+
+def _showcase_submission_lookup_out(submission: Submission):
+    return {
+        "submission_id": submission.id,
+        "username": submission.user.username,
+        "task_title": submission.task.title,
+        "task_display": submission.task.display,
+        "score": submission.score,
+        "view_count": submission.view_count,
+        "has_prompt_chain": Message.objects.filter(submission=submission).exists(),
+    }
+
+
 @router.post("/")
 @login_required
 def create_submission(request, payload: SubmissionIn):
@@ -457,10 +525,141 @@ def list_showcase(request):
     return result
 
 
+@router.get("/showcase/manage/awards", response=List[AwardManageOut])
+@admin_required
+def list_manage_awards(request):
+    awards = Award.objects.annotate(
+        item_count=Count("submission_awards")
+    ).order_by("sort_order", "id")
+    return [_award_manage_out(award) for award in awards]
+
+
+@router.post("/showcase/manage/awards", response=AwardManageOut)
+@admin_required
+def create_manage_award(request, payload: AwardManageIn):
+    _validate_item_ordering(payload.item_ordering)
+    award = Award.objects.create(**payload.dict())
+    award.item_count = 0
+    return _award_manage_out(award)
+
+
+@router.put("/showcase/manage/awards/{award_id}", response=AwardManageOut)
+@admin_required
+def update_manage_award(request, award_id: int, payload: AwardManageIn):
+    _validate_item_ordering(payload.item_ordering)
+    award = get_object_or_404(Award, id=award_id)
+    award.name = payload.name
+    award.description = payload.description
+    award.sort_order = payload.sort_order
+    award.is_active = payload.is_active
+    award.item_ordering = payload.item_ordering
+    award.save(
+        update_fields=[
+            "name",
+            "description",
+            "sort_order",
+            "is_active",
+            "item_ordering",
+        ]
+    )
+    award.item_count = award.submission_awards.count()
+    return _award_manage_out(award)
+
+
+@router.delete("/showcase/manage/awards/{award_id}")
+@admin_required
+def delete_manage_award(request, award_id: int):
+    award = get_object_or_404(Award, id=award_id)
+    award.delete()
+    return {"message": "删除成功"}
+
+
+@router.get(
+    "/showcase/manage/submissions/{submission_id}",
+    response=ShowcaseSubmissionLookupOut,
+)
+@admin_required
+def get_manage_submission(request, submission_id: UUID):
+    submission = get_object_or_404(
+        Submission.objects.select_related("user", "task"),
+        id=submission_id,
+    )
+    return _showcase_submission_lookup_out(submission)
+
+
+@router.get(
+    "/showcase/manage/awards/{award_id}/items",
+    response=List[AwardItemManageOut],
+)
+@admin_required
+def list_manage_award_items(request, award_id: int):
+    award = get_object_or_404(Award, id=award_id)
+    items = (
+        SubmissionAward.objects.filter(award=award)
+        .select_related("submission", "submission__user", "submission__task")
+        .annotate(
+            has_prompt_chain=Exists(
+                Message.objects.filter(submission_id=OuterRef("submission_id"))
+            )
+        )
+        .order_by(*_award_item_ordering(award))
+    )
+    return [_award_item_manage_out(item) for item in items]
+
+
+@router.post(
+    "/showcase/manage/awards/{award_id}/items",
+    response=AwardItemManageOut,
+)
+@admin_required
+def create_manage_award_item(request, award_id: int, payload: AwardItemIn):
+    award = get_object_or_404(Award, id=award_id)
+    submission = get_object_or_404(
+        Submission.objects.select_related("user", "task"),
+        id=payload.submission_id,
+    )
+    item, created = SubmissionAward.objects.get_or_create(
+        award=award,
+        submission=submission,
+        defaults={"sort_order": payload.sort_order},
+    )
+    if not created:
+        raise HttpError(400, "该作品已在奖项中")
+    item.submission = submission
+    return _award_item_manage_out(item)
+
+
+@router.put("/showcase/manage/items/{item_id}", response=AwardItemManageOut)
+@admin_required
+def update_manage_award_item(request, item_id: int, payload: AwardItemUpdateIn):
+    item = get_object_or_404(
+        SubmissionAward.objects.select_related(
+            "submission",
+            "submission__user",
+            "submission__task",
+        ),
+        id=item_id,
+    )
+    item.sort_order = payload.sort_order
+    item.save(update_fields=["sort_order"])
+    return _award_item_manage_out(item)
+
+
+@router.delete("/showcase/manage/items/{item_id}")
+@admin_required
+def delete_manage_award_item(request, item_id: int):
+    item = get_object_or_404(SubmissionAward, id=item_id)
+    item.delete()
+    return {"message": "删除成功"}
+
+
 @router.get("/showcase/{submission_id}/", response=ShowcaseDetailOut)
 @login_required
 def get_showcase_detail(request, submission_id: UUID):
-    if not SubmissionAward.objects.filter(submission_id=submission_id).exists():
+    if not SubmissionAward.objects.filter(
+        submission_id=submission_id,
+        award__is_active=True,
+    ).exists():
         raise HttpError(404, "作品不存在或未授奖")
 
     sub = get_object_or_404(
@@ -470,6 +669,7 @@ def get_showcase_detail(request, submission_id: UUID):
     has_chain = Message.objects.filter(submission=sub).exists()
     award_names = list(
         SubmissionAward.objects.filter(submission=sub)
+        .filter(award__is_active=True)
         .select_related("award")
         .values_list("award__name", flat=True)
     )
@@ -529,7 +729,10 @@ def _build_prompt_rounds(source_msg: Message):
 @router.get("/showcase/{submission_id}/prompt-chain/", response=List[PromptRoundOut])
 @login_required
 def get_showcase_prompt_chain(request, submission_id: UUID):
-    if not SubmissionAward.objects.filter(submission_id=submission_id).exists():
+    if not SubmissionAward.objects.filter(
+        submission_id=submission_id,
+        award__is_active=True,
+    ).exists():
         raise HttpError(404, "作品不存在或未授奖")
 
     sub = get_object_or_404(Submission, id=submission_id)
@@ -624,4 +827,3 @@ def update_flag(request, submission_id: UUID, payload: FlagIn):
     submission.flag = payload.flag
     submission.save(update_fields=["flag"])
     return {"flag": submission.flag}
-
diff --git a/submission/schemas.py b/submission/schemas.py
index 8285699..ac4aadb 100644
--- a/submission/schemas.py
+++ b/submission/schemas.py
@@ -1,3 +1,4 @@
+from datetime import datetime
 from typing import Optional, Literal
 from ninja import Schema
 from uuid import UUID
@@ -180,6 +181,56 @@ class AwardOut(Schema):
     items: list[ShowcaseItemOut]
 
 
+class AwardManageIn(Schema):
+    name: str
+    description: str = ""
+    sort_order: int = 0
+    is_active: bool = True
+    item_ordering: str = "manual"
+
+
+class AwardManageOut(Schema):
+    id: int
+    name: str
+    description: str
+    sort_order: int
+    is_active: bool
+    item_ordering: str
+    item_count: int
+
+
+class AwardItemIn(Schema):
+    submission_id: UUID
+    sort_order: int = 0
+
+
+class AwardItemUpdateIn(Schema):
+    sort_order: int = 0
+
+
+class ShowcaseSubmissionLookupOut(Schema):
+    submission_id: UUID
+    username: str
+    task_title: str
+    task_display: int
+    score: float
+    view_count: int
+    has_prompt_chain: bool
+
+
+class AwardItemManageOut(Schema):
+    id: int
+    submission_id: UUID
+    username: str
+    task_title: str
+    task_display: int
+    score: float
+    view_count: int
+    sort_order: int
+    awarded_at: datetime
+    has_prompt_chain: bool
+
+
 class ShowcaseDetailOut(Schema):
     submission_id: UUID
     username: str
diff --git a/submission/tests.py b/submission/tests.py
index c882ecd..f5695ea 100644
--- a/submission/tests.py
+++ b/submission/tests.py
@@ -1,10 +1,11 @@
 from django.contrib.auth import get_user_model
 from django.test import TestCase
 
+from account.models import RoleChoices
 from prompt.models import Conversation, Message
 from task.models import Task
 
-from .models import Submission
+from .models import Award, Submission, SubmissionAward
 
 User = get_user_model()
 
@@ -74,3 +75,177 @@ class SubmissionPromptChainTest(TestCase):
         self.assertEqual(len(data), 1)
         self.assertEqual(data[0]["question"], "author prompt")
         self.assertEqual(data[0]["html"], "<button>author</button>")
+
+
+class ShowcaseManagementApiTest(TestCase):
+    def setUp(self):
+        self.admin = _make_user("admin")
+        self.admin.role = RoleChoices.ADMIN
+        self.admin.save(update_fields=["role"])
+        self.student = _make_user("student")
+        self.task = _make_task()
+        self.award = Award.objects.create(name="最佳视觉", sort_order=10)
+        self.submission = Submission.objects.create(
+            user=self.student,
+            task=self.task,
+            html="<main>work</main>",
+            css="main { color: red; }",
+            js="",
+            score=4.5,
+            view_count=8,
+        )
+
+    def test_normal_user_cannot_access_management_api(self):
+        self.client.force_login(self.student)
+
+        resp = self.client.get("/api/submission/showcase/manage/awards")
+        lookup_resp = self.client.get(
+            f"/api/submission/showcase/manage/submissions/{self.submission.id}"
+        )
+
+        self.assertIn(resp.status_code, (302, 403))
+        self.assertIn(lookup_resp.status_code, (302, 403))
+
+    def test_admin_can_find_submission_by_id_for_showcase_management(self):
+        self.client.force_login(self.admin)
+
+        resp = self.client.get(
+            f"/api/submission/showcase/manage/submissions/{self.submission.id}"
+        )
+
+        self.assertEqual(resp.status_code, 200)
+        data = resp.json()
+        self.assertEqual(data["submission_id"], str(self.submission.id))
+        self.assertEqual(data["username"], "student")
+        self.assertEqual(data["task_title"], "Test Challenge")
+        self.assertEqual(data["task_display"], 1)
+        self.assertEqual(data["score"], 4.5)
+        self.assertEqual(data["view_count"], 8)
+        self.assertFalse(data["has_prompt_chain"])
+        self.assertNotIn("html", data)
+
+    def test_admin_can_create_and_update_award(self):
+        self.client.force_login(self.admin)
+
+        create_resp = self.client.post(
+            "/api/submission/showcase/manage/awards",
+            data={
+                "name": "最佳互动",
+                "description": "交互完整",
+                "sort_order": 3,
+                "is_active": True,
+                "item_ordering": "score",
+            },
+            content_type="application/json",
+        )
+        self.assertEqual(create_resp.status_code, 200)
+        created = create_resp.json()
+        self.assertEqual(created["name"], "最佳互动")
+        self.assertEqual(created["item_count"], 0)
+
+        update_resp = self.client.put(
+            f"/api/submission/showcase/manage/awards/{created['id']}",
+            data={
+                "name": "最佳交互",
+                "description": "操作体验完整",
+                "sort_order": 1,
+                "is_active": False,
+                "item_ordering": "view_count",
+            },
+            content_type="application/json",
+        )
+        self.assertEqual(update_resp.status_code, 200)
+        updated = update_resp.json()
+        self.assertEqual(updated["name"], "最佳交互")
+        self.assertEqual(updated["description"], "操作体验完整")
+        self.assertEqual(updated["sort_order"], 1)
+        self.assertFalse(updated["is_active"])
+        self.assertEqual(updated["item_ordering"], "view_count")
+
+    def test_admin_cannot_add_same_submission_twice(self):
+        self.client.force_login(self.admin)
+        payload = {"submission_id": str(self.submission.id), "sort_order": 2}
+
+        first_resp = self.client.post(
+            f"/api/submission/showcase/manage/awards/{self.award.id}/items",
+            data=payload,
+            content_type="application/json",
+        )
+        self.assertEqual(first_resp.status_code, 200)
+        self.assertEqual(first_resp.json()["submission_id"], str(self.submission.id))
+
+        duplicate_resp = self.client.post(
+            f"/api/submission/showcase/manage/awards/{self.award.id}/items",
+            data=payload,
+            content_type="application/json",
+        )
+
+        self.assertEqual(duplicate_resp.status_code, 400)
+        self.assertEqual(
+            SubmissionAward.objects.filter(
+                award=self.award,
+                submission=self.submission,
+            ).count(),
+            1,
+        )
+
+    def test_public_showcase_hides_removed_or_inactive_items(self):
+        self.client.force_login(self.admin)
+        add_resp = self.client.post(
+            f"/api/submission/showcase/manage/awards/{self.award.id}/items",
+            data={"submission_id": str(self.submission.id), "sort_order": 0},
+            content_type="application/json",
+        )
+        item_id = add_resp.json()["id"]
+
+        self.client.force_login(self.student)
+        visible_resp = self.client.get("/api/submission/showcase/")
+        self.assertEqual(visible_resp.status_code, 200)
+        self.assertEqual(len(visible_resp.json()), 1)
+        detail_resp = self.client.get(
+            f"/api/submission/showcase/{self.submission.id}/"
+        )
+        self.assertEqual(detail_resp.status_code, 200)
+
+        self.client.force_login(self.admin)
+        delete_resp = self.client.delete(
+            f"/api/submission/showcase/manage/items/{item_id}"
+        )
+        self.assertEqual(delete_resp.status_code, 200)
+
+        self.client.force_login(self.student)
+        removed_resp = self.client.get("/api/submission/showcase/")
+        self.assertEqual(removed_resp.status_code, 200)
+        self.assertEqual(removed_resp.json(), [])
+        removed_detail_resp = self.client.get(
+            f"/api/submission/showcase/{self.submission.id}/"
+        )
+        self.assertEqual(removed_detail_resp.status_code, 404)
+
+        self.client.force_login(self.admin)
+        self.client.post(
+            f"/api/submission/showcase/manage/awards/{self.award.id}/items",
+            data={"submission_id": str(self.submission.id), "sort_order": 0},
+            content_type="application/json",
+        )
+        deactivate_resp = self.client.put(
+            f"/api/submission/showcase/manage/awards/{self.award.id}",
+            data={
+                "name": self.award.name,
+                "description": self.award.description,
+                "sort_order": self.award.sort_order,
+                "is_active": False,
+                "item_ordering": self.award.item_ordering,
+            },
+            content_type="application/json",
+        )
+        self.assertEqual(deactivate_resp.status_code, 200)
+
+        self.client.force_login(self.student)
+        inactive_resp = self.client.get("/api/submission/showcase/")
+        self.assertEqual(inactive_resp.status_code, 200)
+        self.assertEqual(inactive_resp.json(), [])
+        inactive_detail_resp = self.client.get(
+            f"/api/submission/showcase/{self.submission.id}/"
+        )
+        self.assertEqual(inactive_detail_resp.status_code, 404)