At present, the industry functional interface automation test basically relies on the development capability of the script, and has the pain points of high learning curve, high threshold, high input cost, slow response demand and small audience range. By analyzing these pain points, this paper proposes a new mode of interface automation test based on the layout of test process flow chart which is simple and efficient,and develops the corresponding application products based on this model. With the product, the real-time transaction interface, clear settlement interface and database test are realized. At last, the feasibility and advantages of the model are explored and verified from various aspects such as application practice and application effect.