With the emergence of a large number of software, in addition to whether the functions of the software are perfect, higher security and stability requirements are put forward to the software itself. A piece of software needs to be tested a lot before it goes live in order to improve the quality of the software. As developers participate in the software development and online process, it leads to limitations in viewing software issues. When testers write test cases, the value of test cases is often compromised due to the inconsistency of the basis documents. And in the actual software development process, the test link is seriously out of touch with the development. It is often just to test for the corresponding test report, which deviates from the original intention of the test. In response to the above problems, the model-based use case generation method proposed in this article can be based on a variety of test methods such as work flow charts, decision tables, and state transitions, and the idea of ??boundary values ??and equivalence classes is applied in this method, which can run through the entire software In the R D life cycle, you can participate in testing at the early stage of software R D, and propose deficiencies in the design plan. And can automatically generate test cases to improve the efficiency of testers.