Abstract: With the rapid development of the Internet industry, and the proposed concept of big data, in order to improve the test efficiency for the application of a large number of B/S architecture, this article designed and developed an automated testing tool of keyword-driven test script based B/S architecture application that was EasyWT. It was implemented the function of control extraction, recording, motivation, verification and etc. on the Web page, implemented a standardized test procedures basically. The application of EasyWT on railway big data platform was carried out. The application result showed that the System could complete all the work of automated testing. Meanwhile, in view of some problems in practice, the article proposed some improvement and optimization schemes.