The invention discloses efficient grinding equipment for metal casting. The efficient grinding equipment for metal casting comprises a device body, wherein a back plate is vertically installed at the position, close to the edge, of the surface of the top of the device body, fixing blocks are symmetrically installed on the surface of the back plate, sliding rails are arranged on the surfaces of the fixing blocks, and an adjusting plate is arranged between the two fixing blocks; and sliding blocks are arranged at the two ends of the adjusting plate, the adjusting plate is slidably connected with the sliding rails through the sliding blocks, a spur rack is arranged on the surface of the bottom end of the adjusting plate, a supporting plate is arranged on the surface of the back plate, and a second rotating rod is movably connected to the surface of the supporting plate. According to the efficient grinding equipment, through the cooperative use of the back plate, the fixing blocks, the adjusting plate, the sliding rails, the sliding blocks, a mounting plate, the spur rack, the second rotating rod, a second adjusting wheel and a second driving gear, operation of a grinding mechanism is facilitated, the traditional mode that a worker manually picks up the grinding mechanism for grinding is changed, the labor amount of the worker is reduced, and the working efficiency of the device body is also improved.