Fine grinding device for sand and stone material processing

The utility model relates to the technical field of sandstone production, in particular to a fine grinding device for sandstone material processing, and aims to solve the problem that a grinding device in the prior art is low in working efficiency during use, the fine grinding device comprises a mounting plate, a working box is mounted at the top of the mounting plate, and a feeding box is mounted at the top of the working box; a discharging cavity and a plurality of grinding cavities are formed in the mounting plate, grinding stones matched with the grinding cavities for use are mounted in the grinding cavities, the discharging cavity is located below the grinding cavities, and discharging openings communicating with the discharging cavity are formed in the bottoms of the grinding cavities; according to the sand and stone grinding device, sand and stone can be ground at the same time through the multiple grinding grooves, the multiple grinding cavities, the multiple grinding rollers and the multiple grinding