Gear shifting method and gear shifter

The invention relates to a gear shifting method and a gear shifter. Switching between the parking gear P and the reversing gear R is achieved by rotating a gear shifting rotary knob, the gear shiftingrotary knob automatically resets after being pulled upwards, and at the moment, switching to the advancing gear D is achieved; or, switching between the parking gear P and the advancing gear D is achieved by rotating the gear shifting rotary knob, the gear shifting rotary knob automatically resets after being pulled upwards, and at the moment, switching to the reversing gear R is achieved. The gear shifter comprises a base and the gear shifting rotary knob. A first gear switching unit used for achieving gear switching when the gear shifting rotary knob is rotated is arranged in the base. A button capable of sliding downwards, a second gear switching unit used for achieving gear switching when the gear shifting rotary knob resets after being pulled upwards and a third gear switching unit used for achieving gear sw