The invention discloses light mechanical grinding equipment. The light mechanical grinding equipment comprises a base; the base is provided with a gasoline engine, a clutch, a gearbox, a speed reducerand a drum; the gasoline engine is connected with the clutch through a coupling; the gearbox comprises an input shaft and an output shaft, is connected with the clutch through an input shaft, and isconnected with the speed reducer through an output shaft; and the speed reducer is connected with the drum by adopting a planet gear structure. The light mechanical grinding equipment adopts the lightgasoline engine, and the gasoline engine is connected with the gearbox through the coupling, so that the transmission efficiency is provided without adopting belt transmission, and the power loss isreduced; and the speed reducer adopts the planet gear structure with compact structure and high transmission efficiency, so that the mechanical grinding equipment is low in weight and small in size, and meets daily maintenance demands of electric overhead power transmission lines.