Abstract: In aircraft structural dynamic design the matching of the guns with their supporting structure is one of the most important tasks on which hinges the success or failure of the structural design.The design curves for matching the guns with their supporting structure can be obtained from the response calculation of the plate-spring system supporting the gun on the ground, the model structure tested on the ground and the actual structure. A set of matching curves is given for engineering application. Then, the matching design can be accomplished by means of impact load spectrograms so as to perform the optimal structural design and to make further improvement on dynamic strength program.