Abstract: An investigation on the dynamic simulation technology of internal weapons bay’s doors opening and closing was conducted in a high speed wind tunnel.The ratio of internal weap-ons bay length to depth is 6.5.The doors opening and closing dynamic test simulation criteria is analyzed in depth in this paper.The cylinder driven and motor driven institutions were developed to realize the motion of internal weapons bay’s doors.Measurement techniques and data process-ing methods of this dynamic test were investigated,so that the motion characteristics of the doors and the dynamic loads of internal weapons bay system can be recorded and analyzed well and tru-ly.This paper presents the test results for Mach number of 0.6 and the Reynolds number of 1.28 × 10 7/m.The results show that the designs of the motion institutions are reasonable and both the cylinder driven and the motor driven institutions can achieve rapid opening and closing motion of the doors.The motion velocity can be adjusted over a large scale by using motor driven devices.The measurement system is reliable which can obtain dynamic loads and motion characteristics of the doors accurately under subsonic,transonic and supersonic conditions.Data processing method is feasible,the energy distribution characteristics and spectral characteristics were obtained by using this method and the flow field and the bay doors dynamic load characteristics were studied.