In order to accurately measure dynamic parameters of fuze in the chamber or during flight, a miniature missile-borne tester that can be placed inside the fuze was designed and the functions and features of the tester were analyzed in the article. Through enhancing treatment to the tester, a highly efficient buffer structure was developed. Three-axis speed and acceleration signal in the chamber and in the process of launch was successfully obtained when the tester was put in the simulation environment. This study will bring great significance to fuzes, projectiles and artilleries for their design, inspection and research.