In order to solve the launch safety problems of bore burst, early burst and disassembly because of the bad launch environment, the test method of launch safety of ammunition are developed. Based on the results of launch dynamics law of weapon system and multi-body dynamics, the mechanism of bore burst, early burst and disassembly was expatiated. The evaluation theory and test method of launch safety of ammunition were introduced. The test results show that many launch safety problems have been solved by using this method. The key technology and means for establishing the test standard of launch safety of ammunition, and the new way to improve the test level of launch safety of ammunition are provided.