diff --git a/src/api/ops/rbac2.ts b/src/api/ops/rbac2.ts
index e6a495a..d83bf7c 100644
--- a/src/api/ops/rbac2.ts
+++ b/src/api/ops/rbac2.ts
@@ -20,12 +20,13 @@ export interface UserItem {
 export interface UserListResponse {
   code: number;
   message: string;
-  data: UserItem[];
+  data?: UserItem[] | { data?: UserItem[] };
+  details?: UserItem[] | { data?: UserItem[] };
 }
 
 /**
  * 获取用户列表
  */
 export const fetchUserList = async (data: any) => {
-  return request.post<UserListResponse>('/rbac2/v1/user/list', data);
+  return request.post<UserListResponse>('/rbac2/v1/user/list', data, { needWorkspace: true });
 };
diff --git a/src/views/ops/pages/alert/setting/components/PolicyCreateDialog.vue b/src/views/ops/pages/alert/setting/components/PolicyCreateDialog.vue
index d77feec..8705dab 100644
--- a/src/views/ops/pages/alert/setting/components/PolicyCreateDialog.vue
+++ b/src/views/ops/pages/alert/setting/components/PolicyCreateDialog.vue
@@ -119,11 +119,14 @@
                   placeholder="请选择处理人"
                   allow-search
                   allow-clear
+                  :filter-option="false"
                   :loading="userLoading"
+                  @search="handleUserSearch"
                   :style="{ width: '100%' }"
+                  :trigger-props="selectTriggerProps"
                 >
                   <a-option v-for="user in userOptions" :key="user.id" :value="user.id">
-                    {{ user.name || user.username }} ({{ user.username }})
+                    {{ user.name || user.account }} ({{ user.account }})
                   </a-option>
                 </a-select>
               </template>
@@ -133,9 +136,18 @@
       </a-form-item>
 
       <a-form-item label="默认处理人">
-        <a-select v-model="defaultAssigneeId" placeholder="请选择默认处理人" allow-search allow-clear :loading="userLoading">
+        <a-select
+          v-model="defaultAssigneeId"
+          placeholder="请选择默认处理人"
+          allow-search
+          allow-clear
+          :filter-option="false"
+          :loading="userLoading"
+          @search="handleUserSearch"
+          :trigger-props="selectTriggerProps"
+        >
           <a-option v-for="user in userOptions" :key="user.id" :value="user.id">
-            {{ user.name || user.username }} ({{ user.username }})
+            {{ user.name || user.account }} ({{ user.account }})
           </a-option>
         </a-select>
       </a-form-item>
@@ -153,6 +165,7 @@ import { ref, reactive, watch } from 'vue'
 import { Message } from '@arco-design/web-vue'
 import type { FormInstance } from '@arco-design/web-vue'
 import { createPolicy, fetchTemplateList, fetchSeverityList, fetchFeedbackTemplateOptions } from '@/api/ops/alertPolicy'
+import { fetchUserList } from '@/api/ops/rbac2'
 
 interface Props {
   visible: boolean
@@ -201,11 +214,7 @@ const formRules = {
 
 const templateOptions = ref<any[]>([])
 const feedbackTemplateOptions = ref<any[]>([])
-const userOptions = ref<any[]>([
-  { id: 1, name: '张三', username: 'zhangsan' },
-  { id: 2, name: '李四', username: 'lisi' },
-  { id: 3, name: '王五', username: 'wangwu' },
-])
+const userOptions = ref<any[]>([])
 const severityList = ref<any[]>([
   { code: 'critical', name: '严重', color: 'red' },
   { code: 'major', name: '重要', color: 'orange' },
@@ -242,6 +251,51 @@ const loadSeverityList = async () => {
   }
 }
 
+const loadUserOptions = async (keyword = '') => {
+  userLoading.value = true
+  try {
+    const workspace = import.meta.env.VITE_APP_WORKSPACE || ''
+    const res = await fetchUserList({
+      workspace,
+      keyword: keyword || undefined,
+      status: 1,
+    })
+    const rawList = Array.isArray(res?.data?.data)
+      ? res.data.data
+      : Array.isArray(res?.details?.data)
+        ? res.details.data
+        : Array.isArray(res?.details)
+          ? res.details
+          : Array.isArray(res?.data)
+            ? res.data
+            : []
+    userOptions.value = rawList.map((item: any) => ({
+      id: Number(item.id),
+      name: item.name || '',
+      account: item.account || item.username || '',
+    }))
+  } catch (error) {
+    console.error('获取用户下拉选项失败:', error)
+    userOptions.value = []
+  } finally {
+    userLoading.value = false
+  }
+}
+
+const handleUserSearch = (value: string) => {
+  loadUserOptions(value)
+}
+
+const getSelectPopupContainer = (triggerNode: HTMLElement) => {
+  return triggerNode.closest('.arco-modal') || document.body
+}
+
+const selectTriggerProps = {
+  updateAtScroll: true,
+  autoFitPopupMinWidth: true,
+  getPopupContainer: getSelectPopupContainer,
+}
+
 const loadFeedbackTemplateOptions = async () => {
   feedbackTemplateLoading.value = true
   try {
@@ -361,6 +415,7 @@ watch(
 loadTemplateOptions()
 loadSeverityList()
 loadFeedbackTemplateOptions()
+loadUserOptions()
 initDispatchRuleData()
 </script>
 
diff --git a/src/views/ops/pages/alert/setting/components/PolicyFormDialog.vue b/src/views/ops/pages/alert/setting/components/PolicyFormDialog.vue
index 6277285..bdbcf48 100644
--- a/src/views/ops/pages/alert/setting/components/PolicyFormDialog.vue
+++ b/src/views/ops/pages/alert/setting/components/PolicyFormDialog.vue
@@ -167,15 +167,18 @@
                   placeholder="请选择处理人"
                   allow-search
                   allow-clear
+                  :filter-option="false"
                   :loading="userLoading"
+                  @search="handleUserSearch"
                   :style="{ width: '100%' }"
+                  :trigger-props="selectTriggerProps"
                 >
                   <a-option
                     v-for="user in userOptions"
                     :key="user.id"
                     :value="user.id"
                   >
-                    {{ user.name || user.username }} ({{ user.username }})
+                    {{ user.name || user.account }} ({{ user.account }})
                   </a-option>
                 </a-select>
               </template>
@@ -190,14 +193,17 @@
           placeholder="请选择默认处理人"
           allow-search
           allow-clear
+          :filter-option="false"
           :loading="userLoading"
+          @search="handleUserSearch"
+          :trigger-props="selectTriggerProps"
         >
           <a-option
             v-for="user in userOptions"
             :key="user.id"
             :value="user.id"
           >
-            {{ user.name || user.username }} ({{ user.username }})
+            {{ user.name || user.account }} ({{ user.account }})
           </a-option>
         </a-select>
       </a-form-item>
@@ -223,6 +229,7 @@ import {
   fetchSeverityList,
   fetchFeedbackTemplateOptions,
 } from '@/api/ops/alertPolicy'
+import { fetchUserList } from '@/api/ops/rbac2'
 
 // Props
 interface Props {
@@ -283,11 +290,7 @@ const templateOptions = ref<any[]>([])
 const feedbackTemplateOptions = ref<any[]>([])
 
 // 用户选项（模拟数据，实际应从用户服务获取）
-const userOptions = ref<any[]>([
-  { id: 1, name: '张三', username: 'zhangsan' },
-  { id: 2, name: '李四', username: 'lisi' },
-  { id: 3, name: '王五', username: 'wangwu' },
-])
+const userOptions = ref<any[]>([])
 
 // 告警级别列表
 const severityList = ref<any[]>([
@@ -329,6 +332,51 @@ const loadSeverityList = async () => {
   }
 }
 
+const loadUserOptions = async (keyword = '') => {
+  userLoading.value = true
+  try {
+    const workspace = import.meta.env.VITE_APP_WORKSPACE || ''
+    const res = await fetchUserList({
+      workspace,
+      keyword: keyword || undefined,
+      status: 1,
+    })
+    const rawList = Array.isArray(res?.data?.data)
+      ? res.data.data
+      : Array.isArray(res?.details?.data)
+        ? res.details.data
+        : Array.isArray(res?.details)
+          ? res.details
+          : Array.isArray(res?.data)
+            ? res.data
+            : []
+    userOptions.value = rawList.map((item: any) => ({
+      id: Number(item.id),
+      name: item.name || '',
+      account: item.account || item.username || '',
+    }))
+  } catch (error) {
+    console.error('获取用户下拉选项失败:', error)
+    userOptions.value = []
+  } finally {
+    userLoading.value = false
+  }
+}
+
+const handleUserSearch = (value: string) => {
+  loadUserOptions(value)
+}
+
+const getSelectPopupContainer = (triggerNode: HTMLElement) => {
+  return triggerNode.closest('.arco-modal') || document.body
+}
+
+const selectTriggerProps = {
+  updateAtScroll: true,
+  autoFitPopupMinWidth: true,
+  getPopupContainer: getSelectPopupContainer,
+}
+
 const loadFeedbackTemplateOptions = async () => {
   feedbackTemplateLoading.value = true
   try {
@@ -530,6 +578,7 @@ watch(
 loadTemplateOptions()
 loadSeverityList()
 loadFeedbackTemplateOptions()
+loadUserOptions()
 initDispatchRuleData()
 </script>