diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index f79646ade..86e521b55 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -687,6 +687,7 @@ class StudentWorkController < ApplicationController
     end
     all_student_ids = "(" + @homework.course.student.map{|student| student.student_id}.join(",") + ")"
     all_students = User.where("id in #{all_student_ids}")
+    @commit_student_ids = @homework.student_work_projects.map{|student| student.user_id}
     @users = searchstudent_by_name all_students,name
     respond_to do |format|
       format.js
diff --git a/app/views/student_work/search_course_students.js.erb b/app/views/student_work/search_course_students.js.erb
index fb595e51f..1cea9f27e 100644
--- a/app/views/student_work/search_course_students.js.erb
+++ b/app/views/student_work/search_course_students.js.erb
@@ -18,7 +18,7 @@ $("#all_students_list").empty();
         }
     }
 }
-    <% if user.id.to_i != User.current.id.to_i %>
+    <% if user.id.to_i != User.current.id.to_i && (@commit_student_ids.find{|e| e.to_i == user.id.to_i}).nil? %>
         if (str.indexOf(<%=user.id.to_s %>) < 0) {
             $("#student_<%=user.id %>").one("click",function choose_student() {
                 var li = "<li id='choose_student_<%=user.id %>'";
@@ -29,5 +29,9 @@ $("#all_students_list").empty();
                 $("#choose_students_list").append(li);
             });
         }
+    <% else %>
+        if (str.indexOf(<%=user.id.to_s %>) < 0) {
+            $("#student_<%=user.id %>").attr("title","该学生已加入其它分组");
+        }
     <% end %>
 <% end %>
\ No newline at end of file