Internal grinding machine with abrasive dust cleaning function

The internal grinding machine with the abrasive dust cleaning function comprises a box body and a fixing assembly installed on the inner wall of the box body, the fixing assembly comprises an air cylinder and a clamping plate, a grinding motor is fixed to the upper surface of the box body, an output shaft of the grinding motor penetrates through the upper surface of the box body and is rotationally connected with the box body, and a grinding disc is fixed to the end of the output shaft of the grinding motor; a grinding chip groove is formed in the inner bottom wall of the box body, a sliding groove communicating with the inner wall of the box body is formed in the side wall of the box body, a baffle connected with the sliding groove in a sliding mode is arranged in the sliding groove, and a limiting assembly is installed on the baffle. When the workpiece is polished, the baffle slides to the inner bottom wall of the sliding groove, the sliding groove is closed, then the polishing motor is started to polish th