Dust collecting device for box grinding machine

The dust collecting device for the box grinding machine comprises a box grinding machine body and supporting legs, and fixing bases are symmetrically installed on the surfaces of the two sides of the top of the box grinding machine body. By the adoption of the lateral cover, in the polishing process, acrylic chips are generated due to friction, chips are attached to the surface of the polishing belt, and then the chips are removed through operation of the dust collector; a lateral air suction nozzle at the inner surface position of a lateral cover and a bottom air suction nozzle at the bottom end position of a dust collection box can be driven to perform air suction operation at the same time, so that suction of scraps at a grinding point when the acrylic box is ground and suction operation of the scraps moving along with a grinding belt are realized; chippings attached to the surface of the grinding belt can be scraped through scraping of a brush at the bottom end of the dust collection box, so that the chip