Post insulator

The utility model discloses a post insulator, which comprises a post insulator body and a base, the base is fixedly connected to the bottom of the post insulator body, and the top of the post insulator body is provided with a wire clamping mechanism; the wire clamping mechanism comprises an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate are fixed through a fastening bolt, arc-shaped wire grooves are formed in the corresponding positions of the lower surface of the upper clamping plate and the upper surface of the lower clamping plate, and the two ends of each wire groove are each provided with a buffering assembly. Each buffer assembly comprises three sets of elastic pieces and buffer baffles which are arranged at equal intervals, the roots of the elastic pieces are fixedly connected to the groove face of the wire groove, the buffer baffles are fixedly connected to the top ends of the elastic pieces, and the buffer baffles face the central axis of the wi