Abstract: Based on the analysis of the existing servo pressure transmission mechanism, this paper shows a transmission mechanism scheme based on lead screw and wedge. By ADAMS for motion simulation, the virtual prototype of the transmission mechanism is established, the parameters that affect the torque of the servo motor in the transmission mechanism are analyzed. Finally, the inertia matching model is used to optimize the design, and the specifications of the drive motor and the specific parameters of the parts are determined. Compared with the traditional press transmission mechanism, the mechanism has the characteristics of low friction, high stiffness, stable precision and high dynamic response.