The utility model discloses a change switching card of 800kV direct current transmission circuit L cluster insulator with electricity for connect on the transmission tower angle steel and tight filament pole back -to -back, it includes the last link plate and the lower hanging plates of mutual disposition, goes up, lower hanging plates is whole, all including angle steel linkage segment, U type section and the tight filament pole linkage segment arranged in proper order, upward, lower hanging plates passes through the angle steel linkage segment can to dismantle the connection as an organic whole. To go up link plate and lower hanging plates mutual disposition during the use, make its U type duan kayu one side edge of angle steel back -to -back, another side of angle steel linkage segment laminating angle steel, connect the instrument of current change insulators such as tight filament pole in last again, on lower hanging plates's the tight filament pole linkage segment, connect fixed good back cooperation and use current insulating pull -rod, the electrified change of this direction L cluster insulator can be realized to instruments such as broadsword card, need not other new devices, realize current electrified the general of insulator instrument of changing.