Based on gear meshing principle and involute beveloid gear machining principle,the cone model and three-dimensional model of involute beveloid gear transmission joint were established,and the correctness of the model was verified by digital rolling test and ADAMS simulation.In order to study the transmission error of involute beveloid gear,the gear dynamic analysis model was established and the dynamic transmission error was introduced.The influences of different load,speed and axis installation error on gear transmission error were analyzed.The results show that with the increase of load,the transmission error increases,but gradually tends to be stable;with the increase of rotational speed,the transmission error increases approximately linearly and changes obviously; the influence of axis installation error on transmission error is small,and the transmission error changes in the form of ‘ M ’ as a whole with the increase of axis installation error,and it fluctuates periodically.