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 1951822..edce239 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
@@ -38,7 +38,7 @@ public interface ITaskService extends IService<Task> {
      */
     Integer getHolderLevel(String token, Long taskId);
 
-    List<TaskDTO> listMyTasks(String token, Integer projectId) throws BadRequestException;
+    List<TaskDTO> listMyTasks(String token, Integer projectId) throws BadRequestException, ForbiddenException;
 
     Boolean canBeDone(Long 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 35f3b41..6a8a4b2 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
@@ -210,6 +210,8 @@ public class TaskServiceImpl extends ServiceImpl<TaskMapper, Task> implements IT
 
     private int upperBound(List<Task> data, long x) {
         int l = 0, r = data.size() - 1;
+        if(data.get(r).getTaskFatherId().equals(x))
+            return r;
         while (l < r) {
             int mid = (l + r) / 2;
             if (data.get(mid).getTaskFatherId() <= x) l = mid + 1;
@@ -220,8 +222,11 @@ public class TaskServiceImpl extends ServiceImpl<TaskMapper, Task> implements IT
 
 
     @Override
-    public List<TaskDTO> listMyTasks(String token, Integer projectId) {
+    public List<TaskDTO> listMyTasks(String token, Integer projectId) throws ForbiddenException {
         Integer staffId = TokenUtils.getStaffId(token);
+        if(projectGroupService.getProjectAccessLevel(token,projectId)==0){
+            throw new ForbiddenException("不可操作的项目");
+        }
         List<Task> resList = baseMapper.selectList(Wrappers.<Task>lambdaQuery()
                 .select(Task::getTaskId, Task::getTaskFatherId, Task::getTaskHolderId)
                 .eq(Task::getTaskProjectId, projectId)