diff --git a/packages/business/src/locale/lang/en.js b/packages/business/src/locale/lang/en.js
index fc97e30ced..ea841f4fb4 100644
--- a/packages/business/src/locale/lang/en.js
+++ b/packages/business/src/locale/lang/en.js
@@ -354,6 +354,7 @@ export default {
   packages_business_relation_details_huancun: 'Cache',
   packages_business_relation_details_wajue: 'Mining',
   packages_business_relation_details_renwu: 'Tasks',
+  packages_business_agent_select_placeholder: 'Please select an agent',
   packages_business_agent_select_not_found: 'This agent does not exist. Select another agent',
   packages_business_components_connectiontypeselectorsort_wodeshujuyuan: 'My Data Source',
   packages_business_components_connectiontypeselectorsort_jiaoyouTap:
diff --git a/packages/business/src/locale/lang/zh-CN.js b/packages/business/src/locale/lang/zh-CN.js
index 2ff76a97fe..0ad5a63964 100644
--- a/packages/business/src/locale/lang/zh-CN.js
+++ b/packages/business/src/locale/lang/zh-CN.js
@@ -345,6 +345,7 @@ export default {
   packages_business_relation_details_huancun: '缓存',
   packages_business_relation_details_wajue: '挖掘',
   packages_business_relation_details_renwu: '任务',
+  packages_business_agent_select_placeholder: '请选择agent',
   packages_business_agent_select_not_found: '该agent已不存在，请选择其他agent',
   packages_business_components_connectiontypeselectorsort_wodeshujuyuan: '我的数据源',
   packages_business_components_connectiontypeselectorsort_jiaoyouTap:
diff --git a/packages/business/src/locale/lang/zh-TW.js b/packages/business/src/locale/lang/zh-TW.js
index ce698b706f..6cb3424e2d 100644
--- a/packages/business/src/locale/lang/zh-TW.js
+++ b/packages/business/src/locale/lang/zh-TW.js
@@ -346,6 +346,7 @@ export default {
   packages_business_relation_details_huancun: '緩存',
   packages_business_relation_details_wajue: '挖掘',
   packages_business_relation_details_renwu: '任務',
+  packages_business_agent_select_placeholder: '請選擇agent',
   packages_business_agent_select_not_found: '該agent已不存在，請選擇其他agent',
   packages_business_components_connectiontypeselectorsort_wodeshujuyuan: '我的數據源',
   packages_business_components_connectiontypeselectorsort_jiaoyouTap:
diff --git a/packages/business/src/views/connections/DatabaseForm.vue b/packages/business/src/views/connections/DatabaseForm.vue
index ae3ab38716..f720f2c156 100644
--- a/packages/business/src/views/connections/DatabaseForm.vue
+++ b/packages/business/src/views/connections/DatabaseForm.vue
@@ -631,6 +631,9 @@ export default {
           colon: false
         },
         'x-component': 'Select',
+        'x-component-props': {
+          onChange: `{{ () => $self.setSelfErrors('') }}`
+        },
         'x-reactions': [
           '{{useAsyncDataSource(loadAccessNode, "dataSource", {value: $self.value})}}',
           // 根据下拉数据判断是否存在已选的agent
@@ -647,9 +650,12 @@ export default {
         ],
         // 校验下拉数据判断是否存在已选的agent
         'x-validator': `{{(value, rule, ctx)=> {
-            if (value && ctx.field.dataSource?.length) {
+            if (!value) {
+              return '${this.$t('packages_business_agent_select_placeholder')}'
+            } else if (value && ctx.field.dataSource?.length) {
               const current = ctx.field.dataSource.find(item => item.value === value)
               if (!current) {
+                $self.setSelfErrors('')
                 return '${this.$t('packages_business_agent_select_not_found')}'
               }
             }