Secondary cable protection cover in high tension switchgear secondary cable door, its characterized in that are equipped with square frame and protection network, and the peripheral interior periphery with the frame of protection network is connected, one side of frame be equipped with with frame looks vertically landing leg, be equipped with connect the via hole on landing leg and the support, regional relatively fixed that the interior secondary line of high tension switchgear door was arranged, thereby can guarantee the size of frame is fixed, according to spatial layout in the cabinet door, adopt the PVC plastic slab of high strength to be processed into suitable square shape, the cover is realized physics and is kept apart in the secondary wiring, through design the installation that realizes the protection network in a strip groove in the frame, because the protection network has good air permeability, realize electric component's effectual heat dissipation to a possibility of interior secondary line is bumped to the mistake in the work of stopping, and fundamentally guarantees the security of operation, the further emergence of avoid accident, and the security performance is good.