The invention discloses a rotary-knob-type gear shifting device. The rotary-knob-type gear shifting device comprises a rotary knob, a connecting piece, a driven wheel, and elastic limiting pieces, wherein the rotary knob can be rotated to a plurality of gears; the connecting piece is arranged on the rotary knob and extends towards the axial side of the rotary knob; the driven wheel is arranged onthe side, away from the rotary knob, of a rotating shaft, the rotary knob drives the driven wheel to rotate through the connecting piece, and limiting grooves in one-to-one correspondence to the gearsare formed in the driven wheel; and the elastic limiting pieces are fixedly arranged on one sides of the gear limiting grooves and can be matched with the limiting groove corresponding to the gear when the rotary knob rotates to any gear. In the rotary-knob-type gear shifting device, the driven wheel is connected with the rotary knob through the connecting piece, and the length of the connectingpiece can be set according to the need, so that the driven wheel and the elastic limiting pieces can be arranged away from the rotary knob, and the occupied spaces of the driven wheel and the elasticlimiting pieces are not limited by the inner space of the rotary knob.