Abstract: Based on the principle of OMD technology, an outside model decoration equipment system design scheme was propsed. At first, a pressure vessel calculation software was used to design the mould cavity, its thickness was analysed and calculated. According to the material requirements, an appropriate wall thickness was ultimately determined. According to the size of each part, a three-dimensional model was established. Then the guide buffer device was designed to slow down the velocity and shock of the system. At last, according to the system requirements, a sealing system, a hydraulic system and a pneumatic system were designed, including the choose of the sealing ring and the seal type, the selection of the cylinder, the design of the air pressure system, the selection of the hydraulic cylinder and the hydraulic pump and the design of the hydraulic system.The components designed here fitted well,and it had a certain precision and good stability.