diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index b6fdd1fee..b50127b51 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -188,15 +188,21 @@ class PullRequestsController < ApplicationController
   # @return [Gitlab::ObjectifiedHash]
   def accept_pull_request
     begin
-      status = @g.accept_merge_rquest(@project.gpid, params[:id], User.current.gid)
+      @status = @g.accept_merge_rquest(@project.gpid, params[:id], User.current.gid)
       # 接受后，给用户发消息
-      send_message_to_author(@project.id, status.author.try(:username), params[:id], 2)
+      send_message_to_author(@project.id, @status.author.try(:username), params[:id], 2)
 
       respond_to do |format|
-        format.js{redirect_to project_pull_request_path(status.id, :project_id => @project.id)}
+        format.js{redirect_to project_pull_request_path(@status.id, :project_id => @project.id)}
       end
+    rescue Gitlab::Error::Forbidden => e
+      @message = l(:label_pull_request_forbidden)
+    rescue Gitlab::Error::DataNotAccepted => e
+      @message = l(:label_pull_request_datanotaccepted)
+    rescue Gitlab::Error::NotFound => e
+      @message = l(:label_pull_request_notfound)
     rescue Exception => e
-      @message = e.message
+      puts e
     end
   end
 
diff --git a/app/views/pull_requests/_show.html.erb b/app/views/pull_requests/_show.html.erb
index b40c9d6d4..3dd3483a5 100644
--- a/app/views/pull_requests/_show.html.erb
+++ b/app/views/pull_requests/_show.html.erb
@@ -34,7 +34,9 @@
       改动已合并至 <%= @request.target_branch %> 分支
     </div>
 <% else %>
-    <%= render "show_container" %>
+    <div id="unmerged_tip">
+      <%= render "show_container" %>
+    </div>
 <% end %>
 
 
diff --git a/app/views/pull_requests/_show_container.html.erb b/app/views/pull_requests/_show_container.html.erb
index 2016a6ed8..65da01790 100644
--- a/app/views/pull_requests/_show_container.html.erb
+++ b/app/views/pull_requests/_show_container.html.erb
@@ -6,10 +6,10 @@
     <div class="alert alert-orange mb15 ">
       项目分支 <%= @request.source_branch %> 和 <%= @request.target_branch %> 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
     </div>
-<%# elsif !@request.merge_when_build_succeeds %>
-    <!--<div class="alert alert-orange mb15 ">-->
-      <!--Pull Request中存在冲突，请先解决冲突或者手动进行合并。-->
-    <!--</div>-->
+<% elsif @request.try(:merge_status) == "cannot_be_merged" %>
+    <div class="alert alert-orange mb15 ">
+      Pull Request中存在冲突，请先解决冲突或者手动进行合并。
+    </div>
 <% else %>
     <% if is_project_manager?(User.current.id, @project.id) %>
         <div class="alert alert-orange mb15 ">
diff --git a/app/views/pull_requests/accept_pull_request.js.erb b/app/views/pull_requests/accept_pull_request.js.erb
index b9007d7a3..a03871bf9 100644
--- a/app/views/pull_requests/accept_pull_request.js.erb
+++ b/app/views/pull_requests/accept_pull_request.js.erb
@@ -1,2 +1,4 @@
 $("#create_pull_request_error").html('<%= escape_javascript(render :partial => "pull_requests/error_message") %>');
 
+
+
diff --git a/config/locales/projects/zh.yml b/config/locales/projects/zh.yml
index 3eeb912f5..acbc722d1 100644
--- a/config/locales/projects/zh.yml
+++ b/config/locales/projects/zh.yml
@@ -510,4 +510,5 @@ zh:
 
   label_pull_request_conflic: 您创建的Pull Request尚未被管理员接受或者关闭，不能重新创建
   label_pull_request_forbidden: 您没有权限进行该操作
-  label_pull_request_notfound: 您操作的页面不存在或者已被删除
\ No newline at end of file
+  label_pull_request_notfound: 您操作的页面不存在或者已被删除
+  label_pull_request_datanotaccepted: Pull Request中存在冲突，请先解决冲突或者手动进行合并
\ No newline at end of file
diff --git a/lib/gitlab-cli/lib/gitlab/error.rb b/lib/gitlab-cli/lib/gitlab/error.rb
index 96a8a39d6..ced1da100 100644
--- a/lib/gitlab-cli/lib/gitlab/error.rb
+++ b/lib/gitlab-cli/lib/gitlab/error.rb
@@ -27,6 +27,9 @@ module Gitlab
     # Raised when API endpoint returns the HTTP status code 405.
     class MethodNotAllowed < Error; end
 
+    # Raised when API endpoint returns the HTTP status code 406.
+    class DataNotAccepted < Error; end
+
     # Raised when API endpoint returns the HTTP status code 409.
     class Conflict < Error; end
 
diff --git a/lib/gitlab-cli/lib/gitlab/request.rb b/lib/gitlab-cli/lib/gitlab/request.rb
index 683c11776..e1bb1094f 100644
--- a/lib/gitlab-cli/lib/gitlab/request.rb
+++ b/lib/gitlab-cli/lib/gitlab/request.rb
@@ -68,6 +68,7 @@ module Gitlab
         when 403; raise Error::Forbidden.new error_message(response)
         when 404; raise Error::NotFound.new error_message(response)
         when 405; raise Error::MethodNotAllowed.new error_message(response)
+        when 406; raise Error::DataNotAccepted.new error_message(response)
         when 409; raise Error::Conflict.new error_message(response)
         when 500; raise Error::InternalServerError.new error_message(response)
         when 502; raise Error::BadGateway.new error_message(response)