A track polishing medium-frequency power generator is structurally characterized in that a stator punching piece is of a sector splicing piece structure, an oblique groove is formed in a stator core, a power generator rotor punching piece is a salient pole overall punching piece, a rotor coil is directly wound on a rotor core through a varnished wire, an outer-hanging type ventilation device is arranged at an air inlet of a box body side plate of the power generator, cold air can enter a motor through the outer-hanging type ventilation device, hot air is exhausted from the two sides of a front end cover of the power generator, a power generator base is reinforced by machine base ribs, a bottom foot support of the power generator is also reinforced, and the front end cover is designed in a ladder-stretching mode. The track polishing medium-frequency power generator has the advantages of being high in voltage and high in rotating speed, the vibration-resisting requirement is high when a using environment is harsh, the dynamic property is good, load impact bearing capacity is high, the harm of scrap iron generated during working of a polisher can be prevented, meanwhile, imported products are replaced, the production cycle of the track polisher is shortened, and the manufacturing cost of a track polisher manufacturing enterprise is lowered.