diff --git a/inventory-backend/app/api/v1/inbound/base.py b/inventory-backend/app/api/v1/inbound/base.py
index 2960999..2660e0a 100644
--- a/inventory-backend/app/api/v1/inbound/base.py
+++ b/inventory-backend/app/api/v1/inbound/base.py
@@ -371,18 +371,21 @@ def batch_set_warning():
                 # 更新现有记录
                 if 'isEnabled' in item:
                     warning.is_enabled = bool(item['isEnabled'])
-                if 'yellowThreshold' in item:
-                    warning.yellow_threshold = item['yellowThreshold']
-                if 'redThreshold' in item:
-                    warning.red_threshold = item['redThreshold']
+                # 安全转换阈值，None 默认转为 0
+                yellow_val = item.get('yellowThreshold')
+                red_val = item.get('redThreshold')
+                warning.yellow_threshold = float(yellow_val) if yellow_val is not None else 0
+                warning.red_threshold = float(red_val) if red_val is not None else 0
                 updated_count += 1
             else:
                 # 创建新记录
+                yellow_val = item.get('yellowThreshold')
+                red_val = item.get('redThreshold')
                 warning = MaterialWarningSetting(
                     base_id=base_id,
                     is_enabled=item.get('isEnabled', False),
-                    yellow_threshold=item.get('yellowThreshold'),
-                    red_threshold=item.get('redThreshold')
+                    yellow_threshold=float(yellow_val) if yellow_val is not None else 0,
+                    red_threshold=float(red_val) if red_val is not None else 0
                 )
                 db.session.add(warning)
                 created_count += 1
diff --git a/inventory-web/src/views/material/list.vue b/inventory-web/src/views/material/list.vue
index 8b50396..fb89180 100644
--- a/inventory-web/src/views/material/list.vue
+++ b/inventory-web/src/views/material/list.vue
@@ -1204,13 +1204,23 @@ const submitWarning = async () => {
 
   await warningFormRef.value.validate();
 
+  // 安全转换数值，null/undefined 默认转为 0
+  const yellow = Number(warningForm.yellowThreshold) || 0;
+  const red = Number(warningForm.redThreshold) || 0;
+
+  // 逻辑校验：启用预警时，黄色阈值必须大于红色阈值
+  if (warningForm.isEnabled && yellow !== 0 && red !== 0 && yellow <= red) {
+    ElMessage.warning('黄色阈值必须大于红色阈值');
+    return;
+  }
+
   warningLoading.value = true;
   try {
     const data = warningDialog.selectedIds.map(baseId => ({
       baseId,
       isEnabled: warningForm.isEnabled,
-      redThreshold: warningForm.redThreshold,
-      yellowThreshold: warningForm.yellowThreshold
+      redThreshold: red,
+      yellowThreshold: yellow
     }));
 
     await batchSetWarning(data);