The invention relates to a land rehabilitation excavating gear, in particular to a land rehabilitation excavating gear special for an opencast bauxite mine. The technical aim of providing the land rehabilitation excavating gear special for the opencast bauxite mine is achieved. The land rehabilitation excavating gear special for the opencast bauxite mine comprises an excavating gear body, a front crushing device, a rear crushing device and a control system. The excavating gear body comprises an excavator body, walking devices, a frame, a rotary table, a lazy arm I, a lazy arm II and a bucket. The front crushing device comprises a hydraulic cylinder I, a telescopic rod I, an industrial camera, a crushing hammer, a hydraulic cylinder II and a telescopic rod II. The rear crushing device comprises a hopper, a crushing tooth roller I, a crushing tooth roller II, a motor II, a motor I, universal wheels, a rotary rod, a material distributing plate, a connecting sleeve ring, a pin column, a connecting plate and a motor III. According to the land rehabilitation excavating gear special for the opencast bauxite mine, automatic operation is achieved, and the land rehabilitation excavating efficiency is improved.