The invention belongs to the technical field of generating motor-driven model machines and particularly relates to a generating motor-driven model machine capable of changing the number of damping guiding bars on a magnetic pole. An armature coil of the generating motor-driven model machine is located at a rotor and rotates with the rotor, the magnetic pole, an excitation coil and damping grooves are located on a stator, the damping guiding bars or copying groove-shaped bars are respectively inserted in the damping grooves, an engine base and an end cover both adopt opening structures, so that the operation of testing the damping current can be conveniently conducted in a rotating state, when the actually configured number of the damping guiding bars is smaller than the number of damping groove holes, the laminated type copying groove-shaped bars can be inserted in the vacant damping grooves, the change of the number of the damping guiding bars can be realized without changing the magnetic pole, and the fluctuation of an air-gap field cannot occur due to the existence of the vacant damping grooves. The generating motor-driven model machine can be applied in studying the influence of different number of the damping guiding bars on the stability and transient state performance of a generating motor.