The utility model relates to the field of special equipment for maintaining a switching device for power supply or power distribution, and discloses a universal switch cabinet trolley guide rail, which comprises a rail unit, a telescopic unit and a fixing unit, each rail unit comprises two parallel rails, and the section of each rail is in a U shape. Each telescopic unit comprises two lead screwsand a threaded sleeve. The fixing unit comprises a transverse fixing piece and a vertical fixing piece. The switch cabinet dolly guide rail can be adjusted according to dolly wheel distances of different models, is strong in versatility, is provided with the guide inclined edge, enables the switch cabinet dolly to be easier to adjust when the switch cabinet dolly enters the rail, is light in weight, is easy to carry, and reduces the burden of a worker.