diff --git a/apps/system_manage/serializers/chat_user.py b/apps/system_manage/serializers/chat_user.py
index 561e73e1bd4..a3b4999e1fe 100644
--- a/apps/system_manage/serializers/chat_user.py
+++ b/apps/system_manage/serializers/chat_user.py
@@ -452,8 +452,11 @@ def get_user_list(self, with_valid=True):
             return ChatUserInstanceSerializer(users, many=True).data
 
     @classmethod
-    def list(cls):
-        users = ChatUser.objects.all().order_by("-create_time")
+    def list(cls, nick_name=None):
+        query_set = ChatUser.objects.all().order_by("-create_time")
+        if nick_name:
+            query_set = query_set.filter(nick_name__contains=nick_name)
+        users = query_set[:200]
         return ChatUserInstanceSerializer(users, many=True).data
 
 
diff --git a/apps/system_manage/views/system_chat_user.py b/apps/system_manage/views/system_chat_user.py
index 4393e0b7e6b..fe373c34827 100644
--- a/apps/system_manage/views/system_chat_user.py
+++ b/apps/system_manage/views/system_chat_user.py
@@ -99,7 +99,7 @@ class List(APIView):
             RoleConstants.WORKSPACE_MANAGE,
         )
         def get(self, request: Request):
-            return result.success(ChatUserSerializer.list())
+            return result.success(ChatUserSerializer.list(request.query_params.get("nick_name", None)))
 
     class Operate(APIView):
         authentication_classes = [TokenAuth]
diff --git a/ui/src/api/admin/system/chat-management/chat-user.ts b/ui/src/api/admin/system/chat-management/chat-user.ts
index fb7537496ef..a3012f12aec 100644
--- a/ui/src/api/admin/system/chat-management/chat-user.ts
+++ b/ui/src/api/admin/system/chat-management/chat-user.ts
@@ -17,8 +17,8 @@ import type {
 const prefix = '/system/chat_user'
 
 /** 获取对话用户。 */
-const getChatUser = () => {
-  return get<ChatUserBase[]>(`${prefix}/list`)
+const getChatUser = (query?: Dict<unknown>) => {
+  return get<ChatUserBase[]>(`${prefix}/list`, query)
 }
 
 /** 获取对话用户分页列表。 */
diff --git a/ui/src/views/system/chat-management/user-groups/dialog/CreateGroupMemberDialog.vue b/ui/src/views/system/chat-management/user-groups/dialog/CreateGroupMemberDialog.vue
index 3fd26790710..7f5e0d03aab 100644
--- a/ui/src/views/system/chat-management/user-groups/dialog/CreateGroupMemberDialog.vue
+++ b/ui/src/views/system/chat-management/user-groups/dialog/CreateGroupMemberDialog.vue
@@ -17,18 +17,24 @@ const userOptions = ref<ChatUserBase[]>([])
 const memberForm = reactive<{ userIds: string[] }>({ userIds: [] })
 const formRules: FormRules = { userIds: [{ required: true, message: '请选择对话用户', trigger: 'change' }] }
 
-function open() {
-  visible.value = true
+function loadUserOptions(keyword = '') {
   optionsLoading.value = true
-  return ChatUserApi.getChatUser()
+  return ChatUserApi.getChatUser(keyword ? { nick_name: keyword } : undefined)
     .then((users) => {
-      userOptions.value = users
+      const selectedUserIds = new Set(memberForm.userIds)
+      const selectedUserOptions = userOptions.value.filter(({ id }) => selectedUserIds.has(id))
+      userOptions.value = [...new Map([...selectedUserOptions, ...users].map((user) => [user.id, user])).values()]
     })
     .finally(() => {
       optionsLoading.value = false
     })
 }
 
+function open() {
+  visible.value = true
+  return loadUserOptions()
+}
+
 function submit() {
   const groupId = props.currentGroup?.id
   if (!groupId) return
@@ -64,7 +70,17 @@ defineExpose({ open })
   <MkDialog v-model="visible" title="添加成员" @closed="resetData">
     <el-form ref="formRef" :model="memberForm" :rules="formRules" label-position="top" require-asterisk-position="right" @submit.prevent>
       <el-form-item label="对话用户" prop="userIds">
-        <el-select v-model="memberForm.userIds" class="w-full" filterable multiple :loading="optionsLoading" placeholder="请选择用户名或姓名">
+        <el-select
+          v-model="memberForm.userIds"
+          class="w-full"
+          filterable
+          multiple
+          :loading="optionsLoading"
+          remote
+          :remote-method="loadUserOptions"
+          :reserve-keyword="false"
+          placeholder="请选择用户名或姓名"
+        >
           <el-option v-for="user in userOptions" :key="user.id" :label="user.nick_name" :value="user.id" />
         </el-select>
       </el-form-item>