Aiming at the problem of on-site calibration of shock wave overpressure measuring instrument in weapon shooting range, a method of calibrating shock wave force measuring instrument by using shock tube is designed. Based on the transmission characteristics of the wave surface in the air, the generation process and mathematical relationship of the dynamic pressure are analyzed. According to the Navier-Stokes equation and the finite volume method, the propagation process of the pressure wave in the low pressure section and the secondary pressure rise phenomenon after the reflection of the end face boundary are accurately predicted, and the repeatability measurement of the shock wave dynamic pressure measuring instrument is carried out. The time domain, frequency domain and phase frequency characteristics of the measured signal are analyzed. The results show that the air shock tube can well simulate the dynamic process of explosion under actual working conditions, and can be used to calibrate the shock wave dynamic pressure measuring instrument.