According to the Hertz contact theory, the adaptive performance of pressure mechanism with Archimedes helicoid in the automobile ball type traction continuouslyvariabletransmission proposed by our research group was analyzed and calculated, and the analysis and comparison of both the pressure mechanism with Archimedes helicoid and the pressure mechanism with steel balls and V grooves were performed. In addition, the optimum selecting range of helical angle of pressure helicoid was discussed. The results show that, compared with the pressure mechanism with steel balls and V grooves, the transmission coefficient of the present pressure mechanism is decreased obviously. As a result, the pressurization failure caused by the severe shock generated by pressure between steel balls and V grooves can be avoided, the carrying capacity of the transmission can be improved effectively, and the adaptive pressure performance is much more excellent. In addition, the contact stress of the pressure mechanism in the whole driving cycle was calculated and analyzed by using ABAQUS software. It is verified that the strength of this mechanism enough meets the design requirements.