A shifting power compensating apparatus, comprising an electric power, an electronic control unit and an electric motor. Wherein, the electric power supplies power to the electric motor via the electronic control unit. The electric motor supplies compensated power to the driven apparatus by receiving electric energy from the electric power, The electronic control unit is used for determining movement of a clutch, when the clutch switches from the engaging state to the released state, the electric power is controlled by the electronic control unit to supply power to the electric motor; when the clutch switches from the released state to the engaging state, the electric power is controlled by the electronic control unit to stop power supply to the electric motor. For the shifting of vehicles, by using the power compensating apparatus of the invention, strike of the vehicles when shifting can be avoided, thereby improving amenity of vehicle driving and riding.