Automatic grinding device

The invention discloses an automatic grinding device, and relates to the technical field of grinding. The sliding groove is formed in the machining table, a U-shaped frame is slidably connected to the sliding groove, an air cylinder is fixedly connected to the U-shaped frame, and a shell is fixedly connected to the telescopic end of the air cylinder; and the driving assembly comprises a motor, and the motor is fixed in the shell. Through the arranged grinding piece, a machined piece can be ground, waste chips generated in the grinding process are sucked into a round hole to be collected through adsorption force generated by a suction pump, and the situation that observation of the ground piece in the grinding process is affected due to the fact that the waste chips are scattered and accumulated is avoided. Moreover, after the sweeps are sucked into the round holes to be collected, the sweeps make contact with the machined part to be ground, the size of the sweeps can be changed, the sweeps are filtered throug