Flexible constant-force floating grinding head

The utility model belongs to the technical field of polishing heads, and particularly relates to a flexible constant-force floating polishing head which comprises a flexible constant-force floating head, a power spindle motor is mounted at the bottom of the flexible constant-force floating head, a dust cover is sleeved on the power spindle motor, and the flexible constant-force floating head is connected with the dust cover. A fixing hole is formed in one side of the top of the flexible constant-force floating head, a fixing rod is slidably installed in the fixing hole, a limiting groove is formed in the bottom of one side of the fixing rod, the two ends of the fixing rod extend out of the fixing hole, a fixing groove is formed in the side, close to the fixing rod, of the top of the dustproof cover, and the fixing rod is matched with the fixing groove. According to the utility model, the more effective dustproof cover is additionally arranged, so that the damage caused by dust entering the inside during worki