Abstract.A new type of shellfish precooking processing machine is designed. The structure of horizontal slide device, lifting device and precooking device are designed. The corresponding three-dimensional solid models are constructed by use of the CATIA and the simulation of the shellfish precooking processing machine is completed by it. Shellfish precooking processing machine can realize the automation of shellfish precooking process, reduce human consumption, improve work efficiency and achieve the original purpose of the design.