diff --git a/docs/README.md b/docs/README.md
index 468e34b..21d73f4 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -121,6 +121,7 @@ title: Ruby SDK
     Qiniu::RS.generate_upload_token :scope              => target_bucket,
                                     :expires_in         => expires_in_seconds,
                                     :callback_url       => callback_url,
+                                    :callback_body      => callback_body,
                                     :callback_body_type => callback_body_type,
                                     :customer           => end_user_id,
                                     :escape             => allow_upload_callback_api,
@@ -138,6 +139,9 @@ title: Ruby SDK
 :callback_url
 : 可选，字符串类型（String），用于设置文件上传成功后，七牛云存储服务端要回调客户方的业务服务器地址。
 
+:callback_body
+: 可选，字符串类型（String），用于设置文件上传成功后，七牛云存储服务端向客户方的业务服务器发送回调请求的值。
+
 :callback_body_type
 : 可选，字符串类型（String），用于设置文件上传成功后，七牛云存储服务端向客户方的业务服务器发送回调请求的 `Content-Type`。
 
diff --git a/lib/qiniu/tokens/upload_token.rb b/lib/qiniu/tokens/upload_token.rb
index 35bc70e..10514b4 100755
--- a/lib/qiniu/tokens/upload_token.rb
+++ b/lib/qiniu/tokens/upload_token.rb
@@ -10,12 +10,13 @@ module Qiniu
 
         include Utils
 
-        attr_accessor :scope, :expires_in, :callback_url, :callback_body_type, :customer, :escape, :async_options, :return_body
+        attr_accessor :scope, :expires_in, :callback_url, :callback_body, :callback_body_type, :customer, :escape, :async_options, :return_body
 
         def initialize(opts = {})
           @scope = opts[:scope]
           @expires_in = opts[:expires_in] || 3600
           @callback_url = opts[:callback_url]
+          @callback_body = opts[:callback_body]
           @callback_body_type = opts[:callback_body_type]
           @customer = opts[:customer]
           @escape = opts[:escape]
@@ -26,6 +27,7 @@ module Qiniu
         def generate_signature
           params = {:scope => @scope, :deadline => Time.now.to_i + @expires_in}
           params[:callbackUrl] = @callback_url if !@callback_url.nil? && !@callback_url.empty?
+          params[:callbackBody] = @callback_body if !@callback_body.nil? && !@callback_body.empty?
           params[:callbackBodyType] = @callback_body_type if !@callback_body_type.nil? && !@callback_body_type.empty?
           params[:customer] = @customer if !@customer.nil? && !@customer.empty?
           params[:escape] = 1 if @escape == 1 || @escape == true