diff --git a/backend/app/routers/stats.py b/backend/app/routers/stats.py
index 5c9d7e5..7d50965 100644
--- a/backend/app/routers/stats.py
+++ b/backend/app/routers/stats.py
@@ -68,7 +68,7 @@ async def get_stats_summary(
     # 今日调用次数和 token 消耗
     today_stats = db.query(
         func.count(AICallEvent.id).label('calls'),
-        func.coalesce(func.sum(AICallEvent.total_tokens), 0).label('tokens')
+        func.coalesce(func.sum(AICallEvent.input_tokens + AICallEvent.output_tokens), 0).label('tokens')
     ).filter(
         func.date(AICallEvent.created_at) == today
     ).first()
@@ -77,7 +77,7 @@ async def get_stats_summary(
     week_start = today - timedelta(days=today.weekday())
     week_stats = db.query(
         func.count(AICallEvent.id).label('calls'),
-        func.coalesce(func.sum(AICallEvent.total_tokens), 0).label('tokens')
+        func.coalesce(func.sum(AICallEvent.input_tokens + AICallEvent.output_tokens), 0).label('tokens')
     ).filter(
         func.date(AICallEvent.created_at) >= week_start
     ).first()
@@ -104,7 +104,7 @@ async def get_stats_trend(
     query = db.query(
         func.date(AICallEvent.created_at).label('date'),
         func.count(AICallEvent.id).label('calls'),
-        func.coalesce(func.sum(AICallEvent.total_tokens), 0).label('tokens')
+        func.coalesce(func.sum(AICallEvent.input_tokens + AICallEvent.output_tokens), 0).label('tokens')
     ).filter(
         func.date(AICallEvent.created_at) >= start_date,
         func.date(AICallEvent.created_at) <= end_date