Abstract: In order to solve the missing projectile under high-speed photography which caused by short time, harder synchrotron and low-light-level, a synchronous trigger light source system was designed. A high brightness light-emitting didoe(LED) array controlled by the field-programmable gate array was used as light source. The simulation of LED array by MATLAB software shows that the maximum intensity of the light source array can reach 9104 Lux one meter away from the center position of light source. In the experiment, the camera is triggered when the projectile leaves the muzzle. At the same time, the camera outputs a synchronous trigger signal to trigger the lighting system. The results show that, the bullet charge is 0.15g and the camera frame rate is 5000frame/s. Collide speed is about 100m/s. Experiment results demonstrate that the synchronous trigger system has an effective improvement of the illumination intensity and the degree of synchronization. This study is helpful to improve the projectile testing technology.