Explosion-proof device of high-voltage cable terminal and installation method of explosion-proof device

The invention provides an explosion-proof device of a high-voltage cable terminal and an installation method of the explosion-proof device. The device comprises a top seat and a pedestal, the cross sections of the top seat and the pedestal are circular, upper installation pieces distributed in a circular array are arranged in the periphery of the lower end surface of the top seat, lower installation pieces opposite to the upper installation pieces are arranged correspondingly in the periphery of the upper end surface of the pedestal, the middle portion of the pedestal is provided with a firstthrough hole through which the high-voltage cable terminal penetrates cooperatively, and the middle portion of the top seat is provided with a fixing groove for matching and connecting the head of thehigh-voltage cable terminal; the device further comprises insulating rods whose number is the same with that of the upper installation pieces, the top of each insulating rod is connected with the upper installation piece, the