diff --git a/inventory-backend/app/services/inbound/inbound_summary_service.py b/inventory-backend/app/services/inbound/inbound_summary_service.py
index b245ba6..46f0b04 100644
--- a/inventory-backend/app/services/inbound/inbound_summary_service.py
+++ b/inventory-backend/app/services/inbound/inbound_summary_service.py
@@ -114,6 +114,12 @@ class InboundSummaryService:
                 )
                 query = query.filter(rule)
 
+            # 日期补全：解决零点截断问题
+            if end_date and len(str(end_date).strip()) == 10:
+                end_date = f"{str(end_date).strip()} 23:59:59"
+            if start_date and len(str(start_date).strip()) == 10:
+                start_date = f"{str(start_date).strip()} 00:00:00"
+
             if start_date and end_date:
                 query = query.filter(cte.c.inbound_date.between(start_date, end_date))
 
@@ -286,6 +292,12 @@ class InboundSummaryService:
                 )
                 query = query.filter(rule)
 
+            # 日期补全：解决零点截断问题
+            if end_date and len(str(end_date).strip()) == 10:
+                end_date = f"{str(end_date).strip()} 23:59:59"
+            if start_date and len(str(start_date).strip()) == 10:
+                start_date = f"{str(start_date).strip()} 00:00:00"
+
             if start_date and end_date:
                 query = query.filter(cte.c.inbound_date.between(start_date, end_date))
 
diff --git a/inventory-backend/app/services/outbound_service.py b/inventory-backend/app/services/outbound_service.py
index 50f27b7..92f6f5b 100644
--- a/inventory-backend/app/services/outbound_service.py
+++ b/inventory-backend/app/services/outbound_service.py
@@ -198,6 +198,12 @@ class OutboundService:
         支持跨表搜索：单号、领用人、SKU、物料名称、规格型号
         search_type: all, no, name, sku, material_name, spec_model
         """
+        # 日期补全：解决零点截断问题
+        if end_date and len(str(end_date).strip()) == 10:
+            end_date = f"{str(end_date).strip()} 23:59:59"
+        if start_date and len(str(start_date).strip()) == 10:
+            start_date = f"{str(start_date).strip()} 00:00:00"
+
         # 1. 构建基础查询
         # 如果有关键词，需要联表搜索物料名称和规格型号
         if keyword: