Grinding head

The utility model provides a polishing head which comprises a clamping jig and a brush, the clamping jig comprises a mounting disc and a clamping handle, a boss is arranged on the mounting disc, and a first through hole is formed in the center of the mounting disc and the center of the clamping handle; a second through hole is formed in the brush, and when the brush is installed on the clamping jig, the first through hole is communicated with the second through hole; a third through hole is formed in the mounting disc; and the boss is provided with two notches. According to the scheme, the bristles of the brush make contact with the workpiece, the first through hole and the second through hole are formed, grinding liquid is introduced into the first through hole and the second through hole, when the grinding head rotates at a high speed, the grinding liquid can be dispersed to the grinding surface, making contact with the workpiece, of the bristles, the grinding liquid is recycled, the service life of the gri