The invention provides a gear selecting and shifting force adjusting structure which comprises a speed change manipulating mechanism body, a gear selecting and shifting rod and a toothed plate. A rotary shaft rotationally matched with the speed change manipulating mechanism body is arranged on the gear selecting and shifting rod, and a mounting hole is formed in one end of the gear selecting and shifting rod and internally provided with a spring. One end of the spring is connected with the hole bottom of the mounting hole, and the other end of the spring is connected with a spring pin. The end, away from the spring, on the spring pin is matched with a toothed groove in the toothed plate. The gear selecting and shifting force adjusting structure further comprises a driving mechanism and a locking mechanism. Two sliding blocks are oppositely arranged at the two ends of the toothed plate, and sliding grooves slidably matched with the sliding blocks are formed in the speed change manipulating mechanism body. The sliding direction of the sliding blocks is parallel to the extending direction of the spring pin. The driving mechanism is used for driving the sliding blocks to slide in the sliding grooves and driving the toothed plate to move in the direction close to or away from the mounting hole. The locking mechanism is used for locking the toothed plate. According to the gear selecting and shifting force adjusting structure, gear selecting and shifting force of a speed change manipulating mechanism can be adjusted.