The design principle of the hollow blow molding machine is controlled by microcomputer, adopts a separate computer cabinet, and realizes the PLC man-machine interface. Hydraulic optional product with adjustable wall thickness. The speed regulation is for frequency conversion speed regulation and at the same time with the reducer, the speed regulation is stable, the noise is low and it is durable. Mixing screw to ensure full and uniform plasticization. The mold opening and closing mold transfer system adopts the large beam arm, three-point position, and copper sleeve, which has high precision, low resistance, high speed, durable and not easy to break. The air needle blowing rack adopts the method of hand-cranked platform pliers, which is easy to adjust and has good reliability. Mold and water pipe 14mm, help mold effect. According to customer needs, the protective cover of the blow molding machine is a component, and other components and control systems can be required according to customer needs to provide personalized services.