Two-stage light-gas gun has a large number of applications in various fields of engineering. A two-stage light-gas gun can produce an extremely high pressure in a very short interval of time. In general, the twostage light-gas gun is made up of a high pressure tube, a compression tube and a launch tube, each stage being separated by diaphragms. In the present study, by using a technique schlieren visualization, visualize to the projectile of launched by two-stage light-gas gun. Experiments are carried out to investigate visualization of the flow around the projectile according to angle and mach number of projectile. As the result, small angle and large mach number of projectile were created a strong shock wave.