Taking the hypoid gear of the automobile drive axle as the research object,the tooth contact analysis method combined with the analytical method and the finite element method was studied.The mathematical model of the hypoid gear machining was established based on the HFT method,and the tooth surface equation was deduced.By constructing the tooth surface meshing mathematical model,the transmission error was calculated by using analytical method.The numerical tooth surface was solved by using numerical algorithm,and the 3D model of the gear was constructed.The gear model was imported into the ABAQUS software,and the 3D contact area of the tooth surface was obtained by extracting the instantaneous contact ellipse of the tooth surface in each frame and displayed them all in the last frame.The finite element simulation of tooth surface contact was carried out for an aligned hyperboloid gear,and the grinding experiment was carried out.The results show that the simulation results of the finite element tooth surface contact area are consistent with the results of MASTA software,and they are consistent with the actual rolling inspection contact areas,and the correctness of the tooth contact analysis method fused with the analytical method and the finite element method is verified.