Grinding machine capable of being quickly cleaned and working method thereof

The grinding machine comprises a box body, guide grooves are formed in the inner walls of the two sides of the box body, guide blocks are slidably connected into the guide grooves, first springs are fixed between the guide blocks and the inner walls of the guide grooves, a sieve plate is fixed between the two guide blocks, a collecting opening is formed in the inner wall of the bottom of the box body, and the bottom of the collecting opening communicates with a dust collector. The inner wall of the rear end of the box body is rotationally connected with two first shaft rods, a plurality of blade plates are fixed to the circumferential outer walls of the first shaft rods, a disc is fixed to the front end of each first shaft rod, a positioning column is fixed to the front end of each disc, each positioning column is sleeved with a first connecting rod, and the inner side of each first connecting rod is connected with a second connecting rod through a pin shaft; a baffle is fixed to the front end of the inner wa