diff --git a/app/schemas/daily_diff.py b/app/schemas/daily_diff.py
index fa4a4ca..3610864 100644
--- a/app/schemas/daily_diff.py
+++ b/app/schemas/daily_diff.py
@@ -41,8 +41,8 @@ class DailyDiffQueryRequest(BaseModel):
     check_time_end: Optional[date] = Field(None, description="检查时间结束")
     linecode: Optional[str] = Field(None, description="线路编码")
     linecodes: Optional[List[str]] = Field(None, description="线路编码列表")
-    page: int = Field(1, ge=1, description="页码")
-    page_size: int = Field(20, ge=1, le=1000, description="每页数量")
+    page: Optional[int] = Field(None, ge=1, description="页码，不填则查全部")
+    page_size: Optional[int] = Field(None, ge=1, le=1000, description="每页数量，不填则查全部")
 
 class DailyDiffListResponse(BaseModel):
     """查询列表响应"""
diff --git a/app/services/daily_diff.py b/app/services/daily_diff.py
index d4eb8b3..727afc7 100644
--- a/app/services/daily_diff.py
+++ b/app/services/daily_diff.py
@@ -115,8 +115,8 @@ class DailyDiffService(BaseService[DailyDiff]):
         check_time_end: Optional[date] = None,
         linecode: Optional[str] = None,
         linecodes: Optional[List[str]] = None,
-        page: int = 1,
-        page_size: int = 20
+        page: Optional[int] = None,
+        page_size: Optional[int] = None
     ) -> Tuple[List[DailyDiff], int]:
         """
         多条件查询
@@ -149,9 +149,12 @@ class DailyDiffService(BaseService[DailyDiff]):
         # 获取总数
         total = query.count()
 
-        # 分页
-        offset = (page - 1) * page_size
-        data = query.order_by(DailyDiff.id.desc()).offset(offset).limit(page_size).all()
+        # 分页（如果提供了分页参数）
+        if page is not None and page_size is not None:
+            offset = (page - 1) * page_size
+            data = query.order_by(DailyDiff.id.desc()).offset(offset).limit(page_size).all()
+        else:
+            data = query.order_by(DailyDiff.id.desc()).all()
 
         return data, total