As a universal component, cylindrical pins are often used in the field of machinery, which is used for positioning and connecting parts to ensure the positioning accuracy and connection strength of connecting components. The cylindrical pin and the pin hole adopt an interference fit to ensure the tightness and accuracy of connection and positioning of installed components. In mechanical assembly production application, it is particularly important to ensure pin lead-in and impact pressure. Based on the assembly of a component pin, non-standard equipment for pin press installation using a gas-liquid booster cylinder as the power source is introduced. The pneumatic chydraulic transmission device has the advantages of both pneumatic and hydraulic pressure, and is small in size, which provides power through an air pump to ensure smooth operation. Build a three-dimensional model through special software, complete the operation simulation of the system electrical circuit, and complete the overall optimization of the equipment through mathematical modeling and calculation of the overall structure and pressing force.