Abstract: In response to the problem of increased tooth clearance caused by contact surface wear in traditional worm gear transmission, which affects transmission accuracy and stability, this paper designs a double guide wheel worm gear transmission system. The axial tooth thickness of the worm gear increases proportionally from one end to the other along its axis, while maintaining equal tooth thickness of the worm gear that meshes with it. Then, the meshing clearance between the worm gear and the worm wheel is adjusted by axial movement of the worm gear to improve transmission accuracy. Finally, the reliability of this system was verified through finite element calculations and actual experimental results.