The utility model discloses a building stone cuts grinding device, including the seat, be fixed with the stand on the base, vertical slide rail has been seted up on the stand, and the stand has the slide through vertical slide rail slidable mounting, the nested roating seat that has rotates on the slide, the first crossbeam of roating seat one end fixedly connected with, horizontal slide rail hasbeen seted up on the first crossbeam, first crossbeam has first slider through horizontal slide rail slidable mounting, first slider bottom fixedly connected with second crossbeam, and the second crossbeam has the second slider through horizontal slide rail slidable mounting, second slider bottom is rotated and is connected with the rocking arm, the fixed mounting of rocking arm tip department hasthe headstock, the headstock bottom is connected with the cutter through the main shaft, driving motor is installed at the headstock top, the utility model discloses compact structure, convenient touse can realize the cutting operation of multi -angle, multi -azimuth, the device uses in a flexible way changeable, has satisfied the multiple user demand of stone material in the course of working for machining efficiency is effectively promoted.