Composite insulator grading ring

The invention provides a composite insulator grading ring. The grading ring comprises two semi-circular ring structures, and each semi-circular ring structure comprises a semi-circular ring and a fixing piece. A groove is formed in the center of one end of the semi-circular ring, and a boss matched with the groove in size is arranged in the center of the other end of the semicircular ring; one end of the fixing piece is fixed on the semicircular ring, and the other end of the fixing piece is provided with a clamping groove which is parallel to and coaxial with the semicircular ring and is used for mounting; and the fixing piece is also provided with a corner which enables the clamping groove to deviate from the plane where the semicircular rings are located, so that the two semicircular ring structures can be conveniently installed on the tube core of the insulator to form the grading ring. When the grading ring is mounted and dismounted, the grading ring does not need to be sleeved from two ends of the insul