In view of the importance of gear in the field of modern transmission, how to improve the performance of tooth surface has become a research hotspot. Based on the theory of tooth surface involute, combining the theory of cubic Bspline wavelet multiresolution analysis, with the structure of involute gear tooth surface as the carrier, the discrete data of the tooth surface were obtained by using MATLAB software, and the high frequency filter processing was done by combining the cubic Bspline wavelet matrix of the involute gear tooth surface. In order to compare and analyze the performance of tooth surface, the contact force and vibration of the tooth surface of the two groups of meshing gears were analyzed by using ABAQUS software and ADAMS software respectively.The results show that cubic Bspline wavelet can be used to improve the smoothness of tooth surface,to reduce the contact stress and vibration of tooth surface, and to improve the transmission performance of gear.