The invention relates to a switch cabinet and a lighting device thereof. The switch cabinet comprises a cabinet body, wherein a switch cabinet lighting device is installed on a rear side plate of thecabinet body; the switch cabinet lighting device comprises a mounting plate used for being fixedly connected with the switch cabinet rear side plate; a lighting lamp assembly is mounted on the side, facing the interior of the cabinet body, of the mounting plate; the lighting lamp assembly comprises a lighting lamp; a lighting lamp switch is further mounted on the mounting plate; the lighting lampswitch comprises a transmission piece penetrating through the mounting plate; the end, located on the inner side of the mounting plate, of the transmission piece is connected with a switch shifting piece used for shifting a switch contact of the lighting lamp assembly, a switch handle is arranged at the end, located on the outer side of the mounting plate, of the transmission piece, and the transmission piece and the shifting piece are made of flame-retardant materials. The lighting lamp switch is arranged on the outer side of the cabinet body, and the transmission piece and the shifting pieceare both made of flame-retardant materials, so that harm to personnel outside the cabinet caused by internal arcing leakage of the switch cabinet is avoided.