Abstract: Aiming at the problems of complex logic, high error rate and heavy workload of test script writing in intelligent analysis and fault diagnosis system of railway signal centralized monitoring (CSM), this paper designed an automatic test script generation system. According to CSM intelligent analysis and fault diagnosis technical specifications issued by the China Railway, a test platform was built, the test scripts were classified and counted according to the type of signal equipment. According to the fault service logic of signal equipment, a script generation system is compiled with the idea of data driven design. The system has been verified and tested in three stations of Nanchang West, Danxiashan, and Tengzhou.The application results show that generated time for more than 10000 scripts in large-scale signal centralized station can be controlled within 200 s, the scripts are logical, accurate and practical, which can greatly shorten the test cycle, solve the problems in the process of test script compiling and application, and provide a new idea for signal test.