diff --git a/submission/api.py b/submission/api.py
index 4680a45..7745aee 100644
--- a/submission/api.py
+++ b/submission/api.py
@@ -86,6 +86,8 @@ def list_submissions(request, filters: SubmissionFilter = Query(...)):
             submissions = submissions.filter(flag__isnull=False)
         else:
             submissions = submissions.filter(flag=filters.flag)
+    if filters.zone:
+        submissions = submissions.filter(zone=filters.zone)
 
     if filters.score_lt_threshold is not None:
         submissions = submissions.filter(score__lt=filters.score_lt_threshold)
diff --git a/submission/management/commands/recalculate_scores.py b/submission/management/commands/recalculate_scores.py
new file mode 100644
index 0000000..de9b43e
--- /dev/null
+++ b/submission/management/commands/recalculate_scores.py
@@ -0,0 +1,27 @@
+from django.core.management.base import BaseCommand
+
+from submission.models import Submission
+
+
+class Command(BaseCommand):
+    help = "Recalculate score, raw_score, and zone for all rated submissions"
+
+    def add_arguments(self, parser):
+        parser.add_argument("--dry-run", action="store_true", help="Show what would change without saving")
+
+    def handle(self, *args, **options):
+        dry_run = options["dry_run"]
+        qs = Submission.objects.filter(ratings__isnull=False).distinct()
+        total = qs.count()
+        self.stdout.write(f"Found {total} rated submission(s).")
+
+        if dry_run:
+            self.stdout.write("Dry run — no changes made.")
+            return
+
+        for i, s in enumerate(qs, 1):
+            old_score = s.score
+            s.update_score()
+            self.stdout.write(f"[{i}/{total}] {s.user.username}/{s.task.title}: {old_score:.3f} → {s.score:.3f}  zone={s.zone}")
+
+        self.stdout.write(self.style.SUCCESS("Done."))
diff --git a/submission/migrations/0008_add_zone.py b/submission/migrations/0008_add_zone.py
new file mode 100644
index 0000000..b792853
--- /dev/null
+++ b/submission/migrations/0008_add_zone.py
@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-03-30 11:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submission', '0007_remove_nominated'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='submission',
+            name='zone',
+            field=models.CharField(blank=True, choices=[('featured', '精选'), ('low', '待改进'), ('pending', '待评')], db_index=True, default=None, max_length=10, null=True, verbose_name='分区'),
+        ),
+    ]
diff --git a/submission/models.py b/submission/models.py
index bbd3c41..d2875c3 100644
--- a/submission/models.py
+++ b/submission/models.py
@@ -19,6 +19,12 @@ class FlagChoices(models.TextChoices):
     YELLOW = "yellow", "需要改进"
 
 
+class ZoneChoices(models.TextChoices):
+    FEATURED = "featured", "精选"
+    LOW = "low", "待改进"
+    PENDING = "pending", "待评"
+
+
 class Submission(TimeStampedModel):
     id = models.UUIDField(
         primary_key=True,
@@ -49,6 +55,15 @@ class Submission(TimeStampedModel):
         verbose_name="标记",
     )
     raw_score = models.FloatField(default=0.0, verbose_name="原始加权分")
+    zone = models.CharField(
+        max_length=10,
+        choices=ZoneChoices.choices,
+        null=True,
+        blank=True,
+        default=None,
+        db_index=True,
+        verbose_name="分区",
+    )
 
     class Meta:
         ordering = ("-created",)
@@ -62,6 +77,19 @@ class Submission(TimeStampedModel):
         """
         return self.task.task_type
 
+    def _update_zone(self, n: int):
+        if n < 5:
+            new_zone = ZoneChoices.PENDING
+        elif self.score >= 4.0:
+            new_zone = ZoneChoices.FEATURED
+        elif self.score < 3.0:
+            new_zone = ZoneChoices.LOW
+        else:
+            new_zone = None
+        if self.zone != new_zone:
+            self.zone = new_zone
+            self.save(update_fields=["zone"])
+
     def update_score(self):
         ratings = list(self.ratings.select_related("user").all())
         n = len(ratings)
@@ -70,15 +98,18 @@ class Submission(TimeStampedModel):
             self.raw_score = 0.0
             self.score = 0.0
             self.save(update_fields=["raw_score", "score"])
+            self._update_zone(n)
             return
 
-        weighted_sum = sum(
-            r.score * (0.5 if r.user.role == RoleChoices.SUPER
-                       else 0.3 if r.user.role == RoleChoices.ADMIN
-                       else 0.2)
+        role_weights = [
+            0.5 if r.user.role == RoleChoices.SUPER
+            else 0.3 if r.user.role == RoleChoices.ADMIN
+            else 0.2
             for r in ratings
-        )
-        self.raw_score = weighted_sum / n
+        ]
+        weighted_sum = sum(r.score * w for r, w in zip(ratings, role_weights))
+        weight_total = sum(role_weights)
+        self.raw_score = weighted_sum / weight_total
 
         C = 3
         global_mean = (
@@ -89,6 +120,7 @@ class Submission(TimeStampedModel):
 
         self.score = (C * global_mean + n * self.raw_score) / (C + n)
         self.save(update_fields=["raw_score", "score"])
+        self._update_zone(n)
 
     def save(self, *args, **kwargs):
         super().save(*args, **kwargs)
diff --git a/submission/schemas.py b/submission/schemas.py
index dd0bb43..88e93bf 100644
--- a/submission/schemas.py
+++ b/submission/schemas.py
@@ -26,6 +26,7 @@ class SubmissionOut(Schema):
     js: Optional[str] = None
     conversation_id: Optional[UUID] = None
     flag: Optional[str] = None
+    zone: Optional[str] = None
     submit_count: int = 0
     created: str
     modified: str
@@ -107,6 +108,7 @@ class SubmissionFilter(Schema):
     username: Optional[str] = None
     user_id: Optional[int] = None
     flag: Optional[Literal["red", "blue", "green", "yellow", "any"]] = None
+    zone: Optional[Literal["featured", "low", "pending"]] = None
     score_min: Optional[float] = None
     score_max_exclusive: Optional[float] = None
     score_lt_threshold: Optional[float] = None