diff --git a/app/database/daily_challenge.py b/app/database/daily_challenge.py
index 35127fa..19feb56 100644
--- a/app/database/daily_challenge.py
+++ b/app/database/daily_challenge.py
@@ -24,6 +24,7 @@ class DailyChallengeStatsBase(SQLModel, UTCBaseModel):
     daily_streak_best: int = Field(default=0)
     daily_streak_current: int = Field(default=0)
     last_update: datetime | None = Field(default=None, sa_column=Column(DateTime))
+    last_day_streak: datetime | None = Field(default=None, sa_column=Column(DateTime))
     last_weekly_streak: datetime | None = Field(default=None, sa_column=Column(DateTime))
     playcount: int = Field(default=0)
     top_10p_placements: int = Field(default=0)
@@ -103,4 +104,5 @@ async def process_daily_challenge_score(session: AsyncSession, user_id: int, roo
     else:
         stats.weekly_streak_current = 1
     stats.last_update = now
+    stats.last_day_streak = now
     stats.last_weekly_streak = now
diff --git a/app/service/daily_challenge.py b/app/service/daily_challenge.py
index 13be1a4..d313921 100644
--- a/app/service/daily_challenge.py
+++ b/app/service/daily_challenge.py
@@ -156,13 +156,14 @@ async def process_daily_challenge_top():
             stats = await session.get(DailyChallengeStats, score.user_id)
             if stats is None:  # not execute
                 return
-
-            if total_score_count < 10 or ceil(i + 1 / total_score_count) <= 0.1:
-                stats.top_10p_placements += 1
-            if total_score_count < 2 or ceil(i + 1 / total_score_count) <= 0.5:
-                stats.top_50p_placements += 1
+            if stats.last_update is None or stats.last_update.replace(tzinfo=UTC).date() != now.date():
+                if total_score_count < 10 or ceil(i + 1 / total_score_count) <= 0.1:
+                    stats.top_10p_placements += 1
+                if total_score_count < 2 or ceil(i + 1 / total_score_count) <= 0.5:
+                    stats.top_50p_placements += 1
             s.append(s)
             participated_users.append(score.user_id)
+            stats.last_update = now
         await session.commit()
         del s
 
@@ -176,3 +177,4 @@ async def process_daily_challenge_top():
                 stats.last_weekly_streak.replace(tzinfo=UTC), now - timedelta(days=7)
             ):
                 stats.weekly_streak_current = 0
+            stats.last_update = now
diff --git a/migrations/versions/178873984b22_daily_challenge_add_last_day_streak.py b/migrations/versions/178873984b22_daily_challenge_add_last_day_streak.py
new file mode 100644
index 0000000..f488ded
--- /dev/null
+++ b/migrations/versions/178873984b22_daily_challenge_add_last_day_streak.py
@@ -0,0 +1,47 @@
+"""daily_challenge: add last_day_streak
+
+Revision ID: 178873984b22
+Revises: 5b76689f6e4b
+Create Date: 2025-08-22 13:34:31.282236
+
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = "178873984b22"
+down_revision: str | Sequence[str] | None = "5b76689f6e4b"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column(
+        "daily_challenge_stats",
+        "last_update",
+        new_column_name="last_day_streak",
+        existing_type=sa.DateTime(),
+        nullable=True,
+    )
+    op.add_column("daily_challenge_stats", sa.Column("last_update", sa.DateTime(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column(
+        "daily_challenge_stats",
+        "last_update",
+        existing_type=sa.DateTime(),
+        nullable=True,
+    )
+    op.alter_column("daily_challenge_stats", "last_day_streak", new_column_name="last_update")
+    # ### end Alembic commands ###