diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/ITaskService.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/ITaskService.java
index 55372e2..bb36d34 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/ITaskService.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/ITaskService.java
@@ -13,4 +13,5 @@ import java.util.List;
  */
 public interface ITaskService extends IService<Task> {
     List<Task> getTaskList(String token,Integer projectId,Integer fatherId) throws BadRequestException;
+    Boolean checkHolder(Integer staffId,Integer taskId);
 }
diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java
index e20deca..739c49e 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/TaskServiceImpl.java
@@ -15,6 +15,7 @@ import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * @author 张韬
@@ -29,6 +30,23 @@ public class TaskServiceImpl extends ServiceImpl<TaskMapper, Task> implements IT
         if(projectGroupServiceImpl.getUserLevelInGroup(token,projectId)==0||fatherId==null){
             throw new BadRequestException("错误的访问参数");
         }
-        return baseMapper.selectList(Wrappers.<Task>lambdaQuery().eq(Task::getTaskProjectId,projectId).eq(Task::getTaskFatherId,fatherId));
+        return baseMapper.selectList(Wrappers.<Task>lambdaQuery().eq(Task::getTaskProjectId,projectId).eq(Task::getTaskFatherId,fatherId).eq(Task::getDeleted,false));
+    }
+
+    @Override
+    public Boolean checkHolder(Integer staffId,Integer taskId){
+        try{
+            Task task=baseMapper.selectOne(Wrappers.<Task>lambdaQuery().eq(Task::getTaskId,taskId));
+            if(task==null||staffId<=0)
+                return false;
+            while(task.getTaskFatherId()!=0){
+                if(Objects.equals(task.getTaskHolderId(), staffId))
+                    return true;
+                task=baseMapper.selectOne(Wrappers.<Task>lambdaQuery().eq(Task::getTaskId,task.getTaskFatherId()));
+            }
+            return false;
+        }catch(Exception e){
+            return false;
+        }
     }
 }