In order to adapt to the characteristics of high mobility and high efficiency firing of aviation artillery shells, meet the requirements of convenient transfer and rapid formation of security capabilities, the design of an aerial gun pressure and discharge machine is optimized by using the bullet chain supply structure, and the two working processes of pressure and discharge are realized through the mode of interchangeable components, and the key motion process is simulated and verified by using the dynamics software ADAMS. The power on its power shaft is about 130N,comply with index design requirements.The motion process is reliable. The structure has the characteristics of small size, light weight, simple operation, fast discharge speed, stable and reliable quality, easy to carry and transfer, etc., which can meet the needs of high-intensity modern warfare.