In order to explore the rationality of the laminated structure design of a leak free plunger cylinder seal,the deformation process of the seal during loading was simulated by using ABAQUS software and Mooney-Rivlin model.The deformation law and stress distribution of the seal under light load and large stroke were analyzed.The experiment was designed to study the deformation of the seal in the actual loading process,and the experimental results were compared with the simulation results.The results show that in the whole deformation process,due to the compression of internal and external laminations,the seal laminated structure absorbs large stroke deformation and prevents irregular deformation of the seal.During the deformation of the seal,a large stress concentration will occur at the corner of the seal bottom,and the maximum stress value of the laminated seal structure is far less than that of the ordinary straight cylinder structure,so the laminated structure can effectively reduce the damage of the seal caused by the stress concentration.The results of the model are reliable and accurate in the study of seal deformation,which provides theoretical guidance for the further study and design optimization of seal structure.