In order to improve the sealing performance of the sucker used in present individual climbing wall equipment,a new sealing structure with double layer seal was designed.The outer layer adopts nitrile rubber to provide sufficient shear strength and ensure the stability of the internal flow field of the sucker.The inner layer adopts Silicon foaming rubber to compensate the cracks in the wall and reduce the gas leakage of the vacuum sucker.The sealing structures of two suction cups were studied by using the finite element analysis software Abaqus,and the amount of deformation of two sealing structures into the wall meshes was compared.The simulation results show that the gap filling rate of the new structure can reach 40%,which is far greater than the gap filling rate of 2% of the current sealing structure.The internal flow field of two suction cups after deformation was analyzed by using Fluent software.It is found that the vacuum of the new structure is increased by about 10%,therefore,the effectiveness of the new sealing structure is proved theoretically.