diff --git a/yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/collection/CollectionUtils.java b/yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/collection/CollectionUtils.java
index 9ac411732..b8d57df6d 100644
--- a/yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/collection/CollectionUtils.java
+++ b/yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/collection/CollectionUtils.java
@@ -3,7 +3,6 @@ package cn.iocoder.yudao.framework.common.util.collection;
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.collection.CollectionUtil;
 import cn.hutool.core.util.ArrayUtil;
-import cn.iocoder.yudao.framework.common.util.number.NumberUtils;
 import com.google.common.collect.ImmutableMap;
 
 import java.util.*;
@@ -269,7 +268,7 @@ public class CollectionUtils {
         return deptId == null ? Collections.emptyList() : Collections.singleton(deptId);
     }
 
-    public static <T, U> List<U> convertListByMultiAttr(Collection<T> from,
+    public static <T, U> List<U> convertListByFlatMap(Collection<T> from,
                                                       Function<T, ? extends Stream<? extends U>> func) {
         if (CollUtil.isEmpty(from)) {
             return new ArrayList<>();
@@ -277,11 +276,12 @@ public class CollectionUtils {
         return from.stream().flatMap(func).filter(Objects::nonNull).collect(Collectors.toList());
     }
 
-    public static <T, U> Set<U> convertSetByMultiAttr(Collection<T> from,
-                                                      Function<T, ? extends Stream<? extends U>> func) {
+    public static <T, U> Set<U> convertSetByFlatMap(Collection<T> from,
+                                                    Function<T, ? extends Stream<? extends U>> func) {
         if (CollUtil.isEmpty(from)) {
             return new HashSet<>();
         }
         return from.stream().flatMap(func).filter(Objects::nonNull).collect(Collectors.toSet());
     }
+
 }
diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/BpmTaskController.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/BpmTaskController.java
index 7a8c8b8c8..dcfab78ef 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/BpmTaskController.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/BpmTaskController.java
@@ -101,22 +101,22 @@ public class BpmTaskController {
     @PutMapping("/create-sign")
     @Operation(summary = "加签", description = "before 前加签，after 后加签")
     @PreAuthorize("@ss.hasPermission('bpm:task:update')")
-    public CommonResult<Boolean> addSignTask(@Valid @RequestBody BpmTaskAddSignReqVO reqVO) {
-        taskService.addSignTask(getLoginUserId(), reqVO);
+    public CommonResult<Boolean> createSignTask(@Valid @RequestBody BpmTaskAddSignReqVO reqVO) {
+        taskService.createSignTask(getLoginUserId(), reqVO);
         return success(true);
     }
 
     @DeleteMapping("/delete-sign")
     @Operation(summary = "减签")
     @PreAuthorize("@ss.hasPermission('bpm:task:update')")
-    public CommonResult<Boolean> subSignTask(@Valid @RequestBody BpmTaskSubSignReqVO reqVO) {
-        taskService.subSignTask(getLoginUserId(), reqVO);
+    public CommonResult<Boolean> deleteSignTask(@Valid @RequestBody BpmTaskSubSignReqVO reqVO) {
+        taskService.deleteSignTask(getLoginUserId(), reqVO);
         return success(true);
     }
 
     @GetMapping("children-list")
     @Operation(summary = "获取能被减签的任务")
-    @Parameter(name = "parentId", description = "父级任务ID", required = true)
+    @Parameter(name = "parentId", description = "父级任务 ID", required = true)
     @PreAuthorize("@ss.hasPermission('bpm:task:update')")
     public CommonResult<List<BpmTaskSubSignRespVO>> getChildrenTaskList(@RequestParam("parentId") String parentId) {
         return success(taskService.getChildrenTaskList(parentId));
diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/convert/task/BpmTaskConvert.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/convert/task/BpmTaskConvert.java
index 470cba6ce..60ce84021 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/convert/task/BpmTaskConvert.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/convert/task/BpmTaskConvert.java
@@ -1,6 +1,5 @@
 package cn.iocoder.yudao.module.bpm.convert.task;
 
-import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.date.LocalDateTimeUtil;
 import cn.hutool.core.util.ObjectUtil;
 import cn.hutool.core.util.StrUtil;
@@ -27,6 +26,9 @@ import java.util.Date;
 import java.util.List;
 import java.util.Map;
 
+import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertMultiMap;
+import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.filterList;
+
 /**
  * Bpm 任务 Convert
  *
@@ -171,9 +173,7 @@ public interface BpmTaskConvert {
                                                    Map<String, Task> idTaskMap){
         return CollectionUtils.convertList(bpmTaskExtDOList, task -> {
             BpmTaskSubSignRespVO bpmTaskSubSignRespVO = new BpmTaskSubSignRespVO()
-                    .setName(task.getName())
-                    .setId(task.getTaskId());
-
+                    .setId(task.getTaskId()).setName(task.getName());
             // 后加签任务不会直接设置 assignee ,所以不存在 assignee 的情况，则去取 owner
             Task sourceTask = idTaskMap.get(task.getTaskId());
             String assignee = ObjectUtil.defaultIfBlank(sourceTask.getOwner(),sourceTask.getAssignee());
@@ -190,12 +190,12 @@ public interface BpmTaskConvert {
      * @return 转换后的父子级数组
      */
     default List<BpmTaskRespVO> convertChildrenList(List<BpmTaskRespVO> sourceList) {
-        List<BpmTaskRespVO> childrenTaskList = CollectionUtils.filterList(sourceList, r -> StrUtil.isNotEmpty(r.getParentTaskId()));
-        Map<String, List<BpmTaskRespVO>> parentChildrenTaskListMap = CollectionUtils.convertMultiMap(childrenTaskList, BpmTaskRespVO::getParentTaskId);
+        List<BpmTaskRespVO> childrenTaskList = filterList(sourceList, r -> StrUtil.isNotEmpty(r.getParentTaskId()));
+        Map<String, List<BpmTaskRespVO>> parentChildrenTaskListMap = convertMultiMap(childrenTaskList, BpmTaskRespVO::getParentTaskId);
         for (BpmTaskRespVO bpmTaskRespVO : sourceList) {
             bpmTaskRespVO.setChildren(parentChildrenTaskListMap.get(bpmTaskRespVO.getId()));
         }
-        return CollectionUtils.filterList(sourceList, r -> StrUtil.isEmpty(r.getParentTaskId()));
+        return filterList(sourceList, r -> StrUtil.isEmpty(r.getParentTaskId()));
     }
 
 }
diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskService.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskService.java
index 5310f3e68..42be9260a 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskService.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskService.java
@@ -163,7 +163,7 @@ public interface BpmTaskService {
      * @param userId 被加签的用户和任务 ID，加签类型
      * @param reqVO  当前用户 ID
      */
-    void addSignTask(Long userId, BpmTaskAddSignReqVO reqVO);
+    void createSignTask(Long userId, BpmTaskAddSignReqVO reqVO);
 
     /**
      * 任务减签名
@@ -171,7 +171,7 @@ public interface BpmTaskService {
      * @param userId 当前用户ID
      * @param reqVO  被减签的任务 ID，理由
      */
-    void subSignTask(Long userId, BpmTaskSubSignReqVO reqVO);
+    void deleteSignTask(Long userId, BpmTaskSubSignReqVO reqVO);
 
     /**
      * 获取指定任务的子任务和审批人信息
diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java
index e195608a0..2b0e18e70 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java
@@ -711,7 +711,7 @@ public class BpmTaskServiceImpl implements BpmTaskService {
 
     @Override
     @Transactional(rollbackFor = Exception.class)
-    public void addSignTask(Long userId, BpmTaskAddSignReqVO reqVO) {
+    public void createSignTask(Long userId, BpmTaskAddSignReqVO reqVO) {
         // 1. 获取和校验任务
         TaskEntityImpl taskEntity = validateAddSign(userId, reqVO);
         List<AdminUserRespDTO> userList = adminUserApi.getUserList(reqVO.getUserIdList());
@@ -826,7 +826,7 @@ public class BpmTaskServiceImpl implements BpmTaskService {
 
     @Override
     @Transactional(rollbackFor = Exception.class)
-    public void subSignTask(Long userId, BpmTaskSubSignReqVO reqVO) {
+    public void deleteSignTask(Long userId, BpmTaskSubSignReqVO reqVO) {
         // 1.1 校验 task 可以被减签
         Task task = validateSubSign(reqVO.getId());
         // 1.2 校验取消人存在
@@ -902,12 +902,14 @@ public class BpmTaskServiceImpl implements BpmTaskService {
         stack.push(parentTaskId);
         //控制遍历的次数不超过 Byte.MAX_VALUE，避免脏数据造成死循环
         int count = 0;
+        // TODO @海：< 的前后空格，要注意哈；
         while (!stack.isEmpty() && count<Byte.MAX_VALUE) {
             // 1.2 弹出栈顶任务ID
             String taskId = stack.pop();
             // 1.3 将任务ID添加到结果集合中
             allChildTaskIds.add(taskId);
             // 1.4 获取该任务的子任务列表
+            // TODO @海：有个更高效的写法；一次性去 in 一层；不然每个节点，都去查询一次 db， 太浪费了；每次 in，最终就是 O(h) 查询，而不是 O(n) 查询；
             List<String> childrenTaskIdList = getChildrenTaskIdList(taskId);
             if (CollUtil.isNotEmpty(childrenTaskIdList)) {
                 for (String childTaskId : childrenTaskIdList) {
@@ -920,7 +922,6 @@ public class BpmTaskServiceImpl implements BpmTaskService {
         return allChildTaskIds;
     }
 
-
     /**
      * 获取指定父级任务的所有子任务 ID 集合
      *
@@ -954,13 +955,11 @@ public class BpmTaskServiceImpl implements BpmTaskService {
         }
         List<String> childrenTaskIdList = convertList(taskList, Task::getId);
 
-
-        // 2. 将 owner 和 assignee 统一到一个集合中
-        List<Long> userIds = convertListByMultiAttr(taskList,control ->
+        // 2.1 将 owner 和 assignee 统一到一个集合中
+        List<Long> userIds = convertListByFlatMap(taskList, control ->
                 Stream.of(NumberUtils.parseLong(control.getAssignee()), NumberUtils.parseLong(control.getOwner()))
                         .filter(Objects::nonNull));
-
-        // 3. 组装数据
+        // 2.2 组装数据
         Map<Long, AdminUserRespDTO> userMap = adminUserApi.getUserMap(userIds);
         List<BpmTaskExtDO> taskExtList = taskExtMapper.selectProcessListByTaskIds(childrenTaskIdList);
         Map<String, Task> idTaskMap = convertMap(taskList, TaskInfo::getId);