Abstract: This article analyzed the present situation and problems of 5T System, compared with existing data synchronization techniques, put forward a method of data synchronization based on database log analysis, introduced the process and principle of data synchronization in detail. Based on this method, the architecture of 5T System was optimized, and the solution of the main data synchronization, read and write separation, message push was proposed. Finally, the advantages of this data synchronization scheme were discussed.