In order to simplify the test of the projectile up stroke switch and control the time of the projectile exit, a new pneumatic end control stroke switch compression device is designed. Through the program to control the connection and disconnection of the projectile stroke switch, the signal of simulating the projectile’s exit tube is issued, and the compressed gas in the stroke switch compression device is used to act on the cylinder through the trachea to achieve the purpose of controlling the switch of the projectile stroke switch connection and disconnection. At the same time, by measuring the resistance of the projectile stroke switch, the purpose of testing the projectile stroke switch is achieved. The test results show that the test method is simple and reliable. It can reduce the uncertainty caused by human operation and improve the degree of automation of the test system.