diff --git a/apps/web-antd/src/components/user-select-modal/index.ts b/apps/web-antd/src/components/user-select-modal/index.ts
new file mode 100644
index 00000000..9cb1c93f
--- /dev/null
+++ b/apps/web-antd/src/components/user-select-modal/index.ts
@@ -0,0 +1 @@
+export { default as UserSelectModal } from './user-select-modal.vue';
diff --git a/apps/web-antd/src/components/user-select-modal/user-select-modal.vue b/apps/web-antd/src/components/user-select-modal/user-select-modal.vue
new file mode 100644
index 00000000..4c8db339
--- /dev/null
+++ b/apps/web-antd/src/components/user-select-modal/user-select-modal.vue
@@ -0,0 +1,370 @@
+<script lang="ts" setup>
+import type { Key } from 'ant-design-vue/es/table/interface';
+
+import type { SystemDeptApi } from '#/api/system/dept';
+import type { SystemUserApi } from '#/api/system/user';
+
+import { computed, ref } from 'vue';
+
+import { useVbenModal } from '@vben/common-ui';
+import { handleTree } from '@vben/utils';
+
+import {
+  Button,
+  Col,
+  Input,
+  message,
+  Row,
+  Spin,
+  Transfer,
+  Tree,
+} from 'ant-design-vue';
+
+import { getSimpleDeptList } from '#/api/system/dept';
+import { getSimpleUserList } from '#/api/system/user';
+
+// 部门树节点接口
+interface DeptTreeNode {
+  key: string;
+  title: string;
+  children?: DeptTreeNode[];
+}
+
+defineOptions({ name: 'UserSelectModal' });
+
+const props = withDefaults(
+  defineProps<{
+    cancelText?: string;
+    confirmText?: string;
+    multiple?: boolean;
+    title?: string;
+    value?: number[];
+  }>(),
+  {
+    title: '选择用户',
+    multiple: true,
+    value: () => [],
+    confirmText: '确定',
+    cancelText: '取消',
+  },
+);
+
+const emit = defineEmits<{
+  cancel: [];
+  confirm: [value: number[]];
+  'update:value': [value: number[]];
+}>();
+
+// 部门树数据
+const deptTree = ref<any[]>([]);
+const deptList = ref<SystemDeptApi.Dept[]>([]);
+const expandedKeys = ref<Key[]>([]);
+const selectedDeptId = ref<number>();
+const searchValue = ref('');
+
+// 用户数据
+const userList = ref<SystemUserApi.User[]>([]);
+const filteredUserList = ref<SystemUserApi.User[]>([]);
+const selectedUserIds = ref<string[]>([]);
+
+// 分页数据
+const pagination = ref({
+  pageSize: 10,
+  simple: true,
+  showSizeChanger: true,
+  onChange: (page: number, pageSize: number) => {
+    console.log('🚀 ~ pagination ~ page:', page);
+    console.log('🚀 ~ pagination ~ pageSize:', pageSize);
+  },
+});
+
+// 加载状态
+const loading = ref(false);
+
+// 计算属性：合并已选择的用户和当前部门过滤后的用户
+const transferUserList = computed(() => {
+  // 1. 获取所有已选择的用户
+  const selectedUsers = userList.value.filter((user) =>
+    selectedUserIds.value.includes(String(user.id)),
+  );
+
+  // 2. 获取当前部门过滤后的未选择用户
+  const filteredUnselectedUsers = filteredUserList.value.filter(
+    (user) => !selectedUserIds.value.includes(String(user.id)),
+  );
+
+  // 3. 合并并去重
+  return [...selectedUsers, ...filteredUnselectedUsers];
+});
+
+// 过滤部门树数据
+const filteredDeptTree = computed(() => {
+  if (!searchValue.value) return deptTree.value;
+
+  const filterNode = (node: any): any => {
+    const title = node?.title?.toLowerCase();
+    const search = searchValue.value.toLowerCase();
+
+    // 如果当前节点匹配
+    if (title.includes(search)) {
+      return {
+        ...node,
+        children: node.children?.map((child: any) => filterNode(child)),
+      };
+    }
+
+    // 如果当前节点不匹配，检查子节点
+    if (node.children) {
+      const filteredChildren = node.children
+        .map((child: any) => filterNode(child))
+        .filter(Boolean);
+
+      if (filteredChildren.length > 0) {
+        return {
+          ...node,
+          children: filteredChildren,
+        };
+      }
+    }
+
+    return null;
+  };
+
+  return deptTree.value.map((node: any) => filterNode(node)).filter(Boolean);
+});
+
+// 获取指定部门及其所有子部门的ID列表
+const getChildDeptIds = (
+  deptId: number | undefined,
+  deptList: SystemDeptApi.Dept[],
+): number[] => {
+  if (!deptId) return [];
+  const ids = [deptId];
+  const children = deptList.filter((dept) => dept.parentId === deptId);
+  children.forEach((child) => {
+    ids.push(...getChildDeptIds(child.id, deptList));
+  });
+  return ids;
+};
+
+// 获取部门过滤后的用户列表
+const filterUserList = async (deptId: number) => {
+  loading.value = true;
+  try {
+    // 获取部门及其子部门的所有用户
+    const deptIds = getChildDeptIds(deptId, deptList.value);
+    filteredUserList.value = userList.value.filter((user) =>
+      deptIds.includes(user.deptId),
+    );
+  } finally {
+    loading.value = false;
+  }
+};
+
+// 处理部门选择
+const handleDeptSelect = (selectedKeys: Key[], _info: any) => {
+  if (selectedKeys.length === 0) return;
+  const deptId = Number(selectedKeys[0]);
+  selectedDeptId.value = deptId;
+  filterUserList(deptId);
+};
+
+// 处理用户选择
+const handleUserChange = (targetKeys: string[]) => {
+  selectedUserIds.value = targetKeys;
+  emit('update:value', targetKeys.map(Number));
+};
+
+// 确认选择
+const handleConfirm = () => {
+  if (selectedUserIds.value.length === 0) {
+    message.warning('请选择用户');
+    return;
+  }
+  emit('confirm', selectedUserIds.value.map(Number));
+  modalApi.close();
+};
+
+// 取消选择
+const handleCancel = () => {
+  emit('cancel');
+  modalApi.close();
+};
+
+// 重置数据
+const resetData = () => {
+  deptTree.value = [];
+  deptList.value = [];
+  userList.value = [];
+  filteredUserList.value = [];
+  selectedUserIds.value = [];
+  selectedDeptId.value = undefined;
+  expandedKeys.value = [];
+  searchValue.value = '';
+  pagination.value = {
+    pageSize: 10,
+    simple: false,
+    showSizeChanger: true,
+  };
+};
+
+// 递归处理部门树节点
+const processDeptNode = (node: any): DeptTreeNode => {
+  return {
+    key: String(node.id),
+    title: `${node.name} (${node.id})`,
+    children: node.children?.map((child: any) => processDeptNode(child)),
+  };
+};
+
+// 打开弹窗
+const open = async () => {
+  resetData();
+  loading.value = true;
+  try {
+    // 加载部门数据
+    const deptData = await getSimpleDeptList();
+    deptList.value = deptData;
+    const treeData = handleTree(deptData);
+    deptTree.value = treeData.map((node) => processDeptNode(node));
+    expandedKeys.value = deptTree.value.map((node) => node.key);
+
+    // 加载用户数据
+    userList.value = await getSimpleUserList();
+    filteredUserList.value = [...userList.value];
+
+    // 设置已选用户
+    if (props.value?.length) {
+      selectedUserIds.value = props.value.map(String);
+    }
+
+    modalApi.open();
+  } finally {
+    loading.value = false;
+  }
+};
+
+// 弹窗配置
+const [ModalComponent, modalApi] = useVbenModal({
+  title: props.title,
+  onCancel: handleCancel,
+});
+
+// 处理部门树展开/折叠
+const handleExpand = (keys: Key[]) => {
+  expandedKeys.value = keys;
+};
+
+// 处理部门搜索
+const handleDeptSearch = (value: string) => {
+  searchValue.value = value;
+
+  // 如果有搜索结果，自动展开所有节点
+  if (value) {
+    const getAllKeys = (nodes: any[]): string[] => {
+      const keys: string[] = [];
+      for (const node of nodes) {
+        keys.push(node.key);
+        if (node.children) {
+          keys.push(...getAllKeys(node.children));
+        }
+      }
+      return keys;
+    };
+    expandedKeys.value = getAllKeys(deptTree.value);
+  } else {
+    // 清空搜索时，只展开第一级节点
+    expandedKeys.value = deptTree.value.map((node) => node.key);
+  }
+};
+
+defineExpose({
+  open,
+});
+</script>
+
+<template>
+  <ModalComponent class="w-[900px]">
+    <Spin :spinning="loading">
+      <Row :gutter="[16, 16]">
+        <Col :span="6">
+          <div class="h-[500px] overflow-auto rounded border border-gray-200">
+            <div class="border-b border-gray-200 p-2">
+              <Input
+                v-model:value="searchValue"
+                placeholder="搜索部门"
+                allow-clear
+                @input="(e) => handleDeptSearch(e.target?.value ?? '')"
+              />
+            </div>
+            <Tree
+              :tree-data="filteredDeptTree"
+              :expanded-keys="expandedKeys"
+              :selected-keys="selectedDeptId ? [String(selectedDeptId)] : []"
+              @select="handleDeptSelect"
+              @expand="handleExpand"
+            />
+          </div>
+        </Col>
+        <Col :span="17">
+          <Transfer
+            :row-key="(record) => String(record.id)"
+            v-model:target-keys="selectedUserIds"
+            :data-source="transferUserList"
+            :titles="['未选', '已选']"
+            :show-search="true"
+            :filter-option="
+              (inputValue, item) =>
+                item.nickname.toLowerCase().includes(inputValue.toLowerCase())
+            "
+            :pagination="pagination"
+            @change="handleUserChange"
+          >
+            <template #render="item">
+              <span class="custom-item"
+                >{{ item.nickname }} ({{ item.id }})</span
+              >
+            </template>
+          </Transfer>
+        </Col>
+      </Row>
+    </Spin>
+    <template #footer>
+      <Button
+        type="primary"
+        :disabled="selectedUserIds.length === 0"
+        @click="handleConfirm"
+      >
+        {{ confirmText }}
+      </Button>
+      <Button @click="handleCancel">{{ cancelText }}</Button>
+    </template>
+  </ModalComponent>
+</template>
+
+<style lang="scss" scoped>
+:deep(.ant-transfer) {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  height: 100%;
+}
+
+:deep(.ant-transfer-list) {
+  flex: 1;
+  height: 100%;
+}
+
+:deep(.ant-transfer-list-search) {
+  padding: 8px;
+}
+
+:deep(.ant-transfer-list-body) {
+  height: calc(100% - 40px);
+}
+
+:deep(.ant-transfer-list-pagination) {
+  margin: 8px 0;
+  text-align: right;
+}
+</style>
diff --git a/apps/web-antd/src/views/bpm/processInstance/detail/index.vue b/apps/web-antd/src/views/bpm/processInstance/detail/index.vue
index a469fb9f..9046151f 100644
--- a/apps/web-antd/src/views/bpm/processInstance/detail/index.vue
+++ b/apps/web-antd/src/views/bpm/processInstance/detail/index.vue
@@ -238,7 +238,11 @@ onMounted(async () => {
   <Page auto-content-height>
     <Card
       class="h-full"
-      :body-style="{ height: 'calc(100% - 140px)', overflowY: 'auto' }"
+      :body-style="{
+        height: 'calc(100% - 140px)',
+        overflowY: 'auto',
+        paddingTop: '12px',
+      }"
     >
       <template #title>
         <span class="text-[#878c93]">编号：{{ id || '-' }}</span>
diff --git a/apps/web-antd/src/views/bpm/processInstance/detail/modules/time-line.vue b/apps/web-antd/src/views/bpm/processInstance/detail/modules/time-line.vue
index 83cd68d0..0a5a3d8f 100644
--- a/apps/web-antd/src/views/bpm/processInstance/detail/modules/time-line.vue
+++ b/apps/web-antd/src/views/bpm/processInstance/detail/modules/time-line.vue
@@ -10,6 +10,7 @@ import { formatDateTime, isEmpty } from '@vben/utils';
 
 import { Avatar, Button, Image, Tooltip } from 'ant-design-vue';
 
+import { UserSelectModal } from '#/components/user-select-modal';
 import { CandidateStrategyEnum, NodeTypeEnum, TaskStatusEnum } from '#/utils';
 
 defineOptions({ name: 'BpmProcessInstanceTimeline' });
@@ -150,10 +151,12 @@ const customApproveUsers = ref<Record<string, any[]>>({}); // key：activityId
 
 // 打开选择用户弹窗
 const handleSelectUser = (activityId: string, selectedList: any[]) => {
+  console.log(userSelectFormRef.value);
   userSelectFormRef.value.open(activityId, selectedList);
 };
 
 // 选择用户完成
+const selectedUsers = ref<number[]>([]);
 const handleUserSelectConfirm = (activityId: string, userList: any[]) => {
   customApproveUsers.value[activityId] = userList || [];
   emit('selectUserConfirm', activityId, userList);
@@ -280,7 +283,7 @@ const shouldShowApprovalReason = (task: any, nodeType: NodeTypeEnum) => {
 
         <!-- 需要自定义选择审批人 -->
         <div
-          v-if="shouldShowCustomUserSelect(activity)"
+          v-if="true || shouldShowCustomUserSelect(activity)"
           class="flex flex-wrap items-center gap-2"
         >
           <Tooltip title="添加用户" placement="left">
@@ -438,5 +441,11 @@ const shouldShowApprovalReason = (task: any, nodeType: NodeTypeEnum) => {
   </a-timeline>
 
   <!-- 用户选择弹窗 -->
-  <UserSelectForm ref="userSelectFormRef" @confirm="handleUserSelectConfirm" />
+  <UserSelectModal
+    ref="userSelectFormRef"
+    v-model:value="selectedUsers"
+    :multiple="true"
+    title="选择用户"
+    @confirm="handleUserSelectConfirm"
+  />
 </template>