The invention discloses a method for synchronously processing data in a distributed application processing system, and relates to a method for processing data in an off-line distributed application processing system. The method comprises the following steps: establishing an electronic notification mechanism guiding data synchronous processing; defining an electrical notification to each system use case; setting an extractor of local data to a client of the system based on a command pattern, wherein, one extract class corresponds to one electrical notification; carrying out service processing in a service unit to generate the electrical notification with number; carrying out service data uploading processing through a data transmission layer by utilizing the information provided by the electrical notification; generating a new electrical notification oriented to a corresponding service unit for downloading; and establishing a processing mechanism for preventing repeat transmission through detecting a successful mark of the sending of the electrical notification and comparing the number of the electrical notification. A standard programmable frame is formed by the data extraction and the service data processing of a server side through an introduction command mode, the expansion of a synchronous function of the service processing can be conveniently carried out, and the synchronization in the internet of the service data is realized.