The invention belongs to the technical field of transmission devices, and particularly relates to an end cam mechanism which comprises a vertical cam shaft, a driven roller and a fixed roller. A cam capable of axially sliding is sleeved on the cam shaft and comprises a cylinder, an upper inclined end face and a lower inclined end face, the upper inclined end face and the lower inclined end face are mutually symmetrical along the radial section of the middle of the cylinder, the edge of the upper inclined end face forms an upper rail, the driven roller contacts with the upper rail, the edge of the lower inclined end face forms a lower rail, the fixed roller contacts with the lower rail, and the fixed roller and the driven roller are positioned in the same vertical direction. By the aid of the end cam mechanism, the lift range of driven components can be increased, working efficiency is improved, and the cam cannot be self-locked.