A driving mechanism capable of moving back and forth quickly, including a rotary motor and a guide frame, wherein the rotary motor is connected to a rotary member, a helical guide groove is formed in an outer wall of the rotary member, the guide frame is installed above the rotary motor, the guide frame is slidingly installed with a slider in a vertical direction, a drive member is disposed on an inner wall of the slider, the drive member can slide along a length direction of the guide groove, and drive the slider to move back and forth in a vertical direction.