diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index 932cdeacd..7409a0b99 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -85,15 +85,10 @@ class PullRequestsController < ApplicationController
     description = params[:description]
     source_branch = params[:source_branch]
     target_branch = params[:target_branch]
+    target_project_id = params[:target_project_id]
     begin
-      # 如果分支没有改动
-      if compare_pull_request(source_branch, target_project, target_branch).blank?
-        @no_updates = 1
-        respond_to do |format|
-          format.html{new_project_pull_request_path()}
-        end
-      else
-        @no_updates = 0
+      # 如果分支有改动
+      if compare_pull_request(source_branch, target_project_id, target_branch)
         # 如果传送了目标项目ID即向fork源项目发送请求
         if params[:forked_project_id] && params[:source_project] == "forked_project_name"
           target_project_id = params[:forked_project_id].to_i
@@ -106,6 +101,11 @@ class PullRequestsController < ApplicationController
             format.js{redirect_to project_pull_request_path(request.id, :project_id => @project.id)}
           end
         end
+      else
+        @tip = 1
+        respond_to do |format|
+          format.js{redirect_to new_project_pull_request_path}
+        end
       end
     rescue Exception => e
       @message = e.message
@@ -114,20 +114,31 @@ class PullRequestsController < ApplicationController
 
   # Compare branch for MR
   # 判断源分支和目标分支是否有改动
+  # status 为true 表示有改动; false:便是没有改动
   def compare_pull_request source_branch, target_project, target_branch
-    user_source_name = @project.owner.try(:login)
+    user_name_source = @project.owner.try(:login)
     identifier = @repository.identifier.downcase
-    git_source_tree = '--git-dir=/home/git/repositories/' + user_name + '/' + identifier + '.git'
+    git_source_tree = '--git-dir=/home/git/repositories/' + user_name_source + '/' + identifier + '.git'
     if target_project
-      git_target_tree = '--git-dir=/home/git/repositories/' + user_name + '/' + identifier + '.git'
-    else
+      user_name_target = Project.find(target_project).owner.try(:login)
+      git_target_tree = '--git-dir=/home/git/repositories/' + user_name_target + '/' + identifier + '.git'
+      # git_target_tree = '--git-dir=/home/git/repositories/' + user_name_target + '/' + identifier + '.git'
+      # remote  git_target_tree = '--git-dir=/home/git/repositories/' + user_name_target + '/' + identifier + '.git'
+      ###########
+      git_sourse_commit_id = @g.get_branch_commit_id(@project.gpid, git_source_tree, source_branch)
+      git_target_commit_id = @g.get_branch_commit_id(user_name_source.gpid, git_target_tree, target_branch)
 
+      ##############
+      # git_sourse_commit_id = `git #{git_source_tree} log #{source_branch} --pretty=oneline -1`
+      # git_target_commit_id = `git #{git_target_tree} log #{target_branch} --pretty=oneline -1`
+      # git_target_commit_id = `--git rev-parse #{target_branch}`
+      # 员项目的源分支和目标项目的目标分支的commit_id如果相同则没有改动
+      status = git_sourse_commit_id ==  git_target_commit_id ? false : true
+    else
+      reuslt = `git #{git_source_tree} log --pretty=oneline #{source_branch} ^#{target_branch}`
+      status = result.blank? ? false : true
     end
-  # def compare_pull_request
-    user_name = @project.owner.try(:login)
-    identifier = @repository.identifier.downcase
-    git_tree = '--git-dir=/home/git/repositories/' + user_name + '/' + identifier + '.git'
-    status = `git #{git_tree} log --pretty=oneline #{source_branch} ^#{target_branch}`
+    status
   end
 
   # @project_menu_type 为了控制base顶部导航
diff --git a/app/views/pull_requests/_form.html.erb b/app/views/pull_requests/_form.html.erb
index a79f8c374..3d7c3661f 100644
--- a/app/views/pull_requests/_form.html.erb
+++ b/app/views/pull_requests/_form.html.erb
@@ -12,7 +12,7 @@
             <% if @forked_project.nil? %>
                 <%= select_tag :branch, options_for_select(@source_rev), :id => "pull_request_branch", :name => "target_branch", :value => "target_branch",:class => "fl PullReques_minselect ml5" %>
             <% else %>
-                <select onchange="choice_branch(this.value, document.getElementById('pull_request_branch'), <%= @source_rev %>, <%= @forked_rev %>);" id="pull_request_project" name="pull_request_project" value="pull_request_project" class="fl PullReques_minselect">
+                <select onchange="choice_branch(this.value, document.getElementById('pull_request_branch'), <%= @source_rev %>, <%= @forked_rev %>);" id="target_project_id" name="target_project_id" value="target_project_id" class="fl PullReques_minselect">
                   <option id="source_project_name" name="<%= @project.id %>" value="<%= @project.id %>" ><%= @source_project_name %></option>
                   <option id="target_project_name" name="<%= @forked_project.id %>" value="<%= @forked_project.id %>" ><%= @forked_project_name %></option>
                 </select>
@@ -21,11 +21,13 @@
                       <option value="<%= rev %>"><%= rev %></option>
                   <% end %>
                 </select>
-                <%= hidden_field_tag 'target_project_id', '' %>
             <% end %>
             <p id="pull_request_project_hidden" style="display: none"><%= @forked_project.nil? ? "" : @project.id %></p>
             <p id="pull_request_compare_result" style="display: none"><%= @no_updates %></p>
           </li>
+          <div id="pull_request_branch_tip">
+            <%= render :partial => "tip" %>
+          </div>
           <div class="alert alert-blue mb10" id ="pull_request_branch_error" style="display: none">
             <span class="c_orange">您选择的源分支和目标分支为似乎没有差异，请将新改动提交至源分支或者切换到其它目标分支</span>
           </div>
@@ -69,7 +71,7 @@
     {
         var source_branch = $.trim($("#source_branch").val());
         var target_branch = $.trim($("#pull_request_branch").val());
-        var target_project = $.trim($("#pull_request_project").children().attr("name"));
+        var target_project = $.trim($("#target_project_id").children().attr("name"));
         var target_forked_project = $.trim($("#pull_request_project_hidden").text());
         if(target_project == target_forked_project && source_branch == target_branch)
         {
diff --git a/app/views/pull_requests/_tip.html.erb b/app/views/pull_requests/_tip.html.erb
new file mode 100644
index 000000000..f511f1588
--- /dev/null
+++ b/app/views/pull_requests/_tip.html.erb
@@ -0,0 +1,5 @@
+<% if @tip %>
+    <div class="alert alert-blue mb10">
+      <span class="c_orange">您选择的源分支和目标分支为似乎没有差异，请将新改动提交至源分支或者切换到其它目标分支</span>
+    </div>
+<% end %>
diff --git a/app/views/pull_requests/new.js.erb b/app/views/pull_requests/new.js.erb
new file mode 100644
index 000000000..2c943e6c2
--- /dev/null
+++ b/app/views/pull_requests/new.js.erb
@@ -0,0 +1 @@
+$("#pull_request_branch_tip").html('<%= escape_javascript(render :partial => "pull_requests/tip") %>');
diff --git a/lib/gitlab-cli/lib/gitlab/client/repositories.rb b/lib/gitlab-cli/lib/gitlab/client/repositories.rb
index 3630f40dd..e016ab6a8 100644
--- a/lib/gitlab-cli/lib/gitlab/client/repositories.rb
+++ b/lib/gitlab-cli/lib/gitlab/client/repositories.rb
@@ -86,6 +86,11 @@ class Gitlab::Client
       get("/projects/#{project}/repository/user_static", :query => options)
     end
 
+    def get_branch_commit_id(project, git_tree, ref_name)
+      post("/projects/#{project}/repository/get_branch_commit_id?git_tree=#{git_tree}&ref_name=#{ref_name}")
+    end
+
+
     # Gets a specific commit identified by the commit hash or name of a branch or tag.
     #
     # @example