diff --git a/lib/dingtalk/api/call_back.rb b/lib/dingtalk/api/call_back.rb
new file mode 100644
index 0000000..fcf1453
--- /dev/null
+++ b/lib/dingtalk/api/call_back.rb
@@ -0,0 +1,25 @@
+module Dingtalk
+  module Api
+    class CallBack < Base
+      def initialize
+        @suite_token = Dingtalk.suite_token
+        @suite_aes_key = Dingtalk.suite_aes_key
+      end
+
+      def register_call_back(call_back_tag = [], url)
+        params = {
+          call_back_tag: call_back_tag,
+          token: @suite_token,
+          aes_key: @suite_aes_key,
+          url: url
+        }
+        http_post("register_call_back?access_token=#{access_token}", params)
+      end
+
+      private
+        def base_url
+          'call_back'
+        end
+    end
+  end
+end
diff --git a/lib/dingtalk/client.rb b/lib/dingtalk/client.rb
index 1181944..0b16b34 100644
--- a/lib/dingtalk/client.rb
+++ b/lib/dingtalk/client.rb
@@ -80,6 +80,10 @@ module Dingtalk
       Api::MicroApp.new(@corp)
     end
 
+    def call_back
+      Api::CallBack.new(@corp)
+    end
+
     private
       def aes_key
         Base64.decode64(Dingtalk.suite_aes_key + '=')
--
libgit2 0.21.0