diff --git a/app/api/mobile/api.rb b/app/api/mobile/api.rb
index 64016458e..d3fe414a4 100644
--- a/app/api/mobile/api.rb
+++ b/app/api/mobile/api.rb
@@ -4,6 +4,7 @@ module Mobile
     version 'v1', using: :path
     format :json
     content_type :json, "application/json;charset=UTF-8"
+    use Mobile::Middleware::ErrorHandler
 
     helpers do
       def logger
diff --git a/app/api/mobile/apis/auth.rb b/app/api/mobile/apis/auth.rb
index 5a6c0f34f..320497e50 100644
--- a/app/api/mobile/apis/auth.rb
+++ b/app/api/mobile/apis/auth.rb
@@ -26,7 +26,7 @@ module Mobile
             present :data, {token: key.access_token, user: api_user}, using: Entities::Auth
             present :status, 0
           else
-            {status: 1, message: 'Unauthorized.'}
+            raise 'Unauthorized.'
           end
         end
 
diff --git a/app/api/mobile/apis/users.rb b/app/api/mobile/apis/users.rb
index 52932b883..6e2952290 100644
--- a/app/api/mobile/apis/users.rb
+++ b/app/api/mobile/apis/users.rb
@@ -12,15 +12,11 @@ module Mobile
         end
         post do
           us = UsersService.new
-          begin
-            user = us.register params.merge(:password_confirmation => params[:password],
-                                            :should_confirmation_password => true)
-            raise "register failed #{user.errors.full_messages}" if user.new_record?
-            present :data, user, with: Mobile::Entities::User
-            present :status, 0
-          rescue => e
-            {status: 1, message: e.message}
-          end
+          user = us.register params.merge(:password_confirmation => params[:password],
+                                          :should_confirmation_password => true)
+          raise "register failed #{user.errors.full_messages}" if user.new_record?
+          present :data, user, with: Mobile::Entities::User
+          present :status, 0
         end
 
 
@@ -37,12 +33,24 @@ module Mobile
         put ':id' do
           authenticate!
           us = UsersService.new
-          begin
-            ue = us.edit_user params.merge(id: current_user.id)
-            {status: 0, data: ue}
-          rescue => e
-            {status: 1, message: e.message}
-          end
+          ue = us.edit_user params.merge(id: current_user.id)
+          present :data, user, with: Mobile::Entities::User
+          present :status, 0
+        end
+
+
+        desc '修改密码'
+        params do
+          requires :token, type: String
+          requires :password, type:String , desc: '原密码'
+          requires :new_password, type: String, desc: '新密码'
+        end
+        post 'password' do
+          authenticate!
+          us = UsersService.new
+          ue = us.change_password params.merge(new_password_confirmation: params[:new_password])
+          present :data, user, with: Mobile::Entities::User
+          present :status, 0
         end
 
       end
diff --git a/app/api/mobile/apis/watches.rb b/app/api/mobile/apis/watches.rb
index ce846debd..4e8510d89 100644
--- a/app/api/mobile/apis/watches.rb
+++ b/app/api/mobile/apis/watches.rb
@@ -10,8 +10,9 @@ module Mobile
         end
         get do
           authenticate!
-          ws = UsersService.new
-          ws.user_watcher(id: current_user.id)
+          us = UsersService.new
+          ws = us.user_watcher(id: current_user.id)
+          {status: 0, data: ws }
         end
 
 
@@ -23,12 +24,8 @@ module Mobile
         post do
           authenticate!
           ws = WatchesService.new
-          begin
             o = ws.watch(params.merge({current_user_id:current_user.id, object_type:'user' }) )
-            {status:0 , data: o}
-          rescue =>e
-            {status:1, message: e.message}
-          end
+            {status:0, data: o}
         end
 
 
@@ -40,12 +37,8 @@ module Mobile
         delete do
           authenticate!
           ws = WatchesService.new
-          begin
-            ws.unwatch(params.merge({current_user_id:current_user.id, object_type:'user' }) )
-            {status:0}
-          rescue =>e
-            {status:1, message: e.message}
-          end
+          ws.unwatch(params.merge({current_user_id:current_user.id, object_type:'user' }) )
+          {status: 0}
         end
 
       end
diff --git a/app/api/mobile/middleware/error_handler.rb b/app/api/mobile/middleware/error_handler.rb
new file mode 100644
index 000000000..3cbc74bd6
--- /dev/null
+++ b/app/api/mobile/middleware/error_handler.rb
@@ -0,0 +1,18 @@
+module Mobile
+  module Middleware
+    class ErrorHandler < Grape::Middleware::Base
+      def call!(env)
+        @env = env
+        begin
+          @app.call(@env)
+        rescue =>e
+          message = {status: 1, message: e.message }.to_json
+          status = 200
+          headers = { 'Content-Type' => content_type }
+          Rack::Response.new([message], status, headers).finish
+          # throw :error, :message => e.message || options[:default_message], :status => 500
+        end
+      end
+    end
+  end
+end
\ No newline at end of file