Polishing device for stone machining

A grinding device for stone machining comprises a working table, the working table comprises stand columns which are arranged on the two sides and fixedly connected with the working table through screws, the tops of the stand columns are provided with inwards-sunken inserting grooves, vertical rods are inserted into the inserting grooves and inserted into height limiting columns, transverse rods are inserted and fixed to the inner sides of the height limiting columns, and the transverse rods are fixedly connected with the working table through screws. The middle of the cross rod penetrates through a mounting bracket, the mounting bracket is connected with a grinding machine shell through a screw, a motor and a dust storage box are fixedly mounted at the top of the grinding machine, and a rotating shaft is connected to the bottom of the motor and linked with a grinding disc; the stone grinding machine solves the problem that an existing stone grinding machine is low in efficiency, meanwhile solves the problems