The utility model relates to a box indoor or outdoor substation, including top cap and box, be equipped with the baffle in the box, the baffle separates the inner chamber of box for wiring closet and transformer room, comprehensive block terminal on one side of being equipped with transformer tank in the transformer room and being located transformer tank, and the service life is improved. Be equipped with the wire board in the wiring closet, be equipped with a plurality of wire guides on the wire board, the housing is internally provided with separator plates, electric wire fixed establishment is including the resettlement groove that sets up two oppositions on the wire guide pore wall, be equipped with pinch -off blades in the resettlement groove, the one end of pinch -off blades is passed through the spring and is connected with the bottom of resettlement groove, the other end of pinch -off blades is equipped with the arc wall, the arc wall of two pinch -off blades with pass the wire guide in the global of electric wire coincide, the access quality of generating line with three -phase high -tension bushing has been guaranteed, and the generating line is supported by the wire board, after being connected with three -phase high -tension bushing, the generating line can not produce the pulling force to three -phase high -tension bushing because of self weight, firm in connection.