The utility model relates to a passenger compartment seat of an aluminum alloy metro vehicle, which comprises a seat support, a seat surface and an outer cover plate; a screw hole is arranged on the seat support; the seat support is connected with the side walls of an aluminum alloy vehicle body; and the seat surface comprises a glass steel outer shell, a reinforcing plate, a polyurethane cushion and covering cloth. The passenger compartment seat of the aluminum alloy metro vehicle has a simple structure, is attractive overall, has a light structure and high strength, is convenient to detach and install, has no exposed bolt, and is simple to maintain. The cleaning to the floor of a passenger compartment is convenient, and the passenger compartment seat of the aluminum alloy metro vehicle is applicable to the arrangement of horizontal seats of the metro vehicle or a light rail vehicle.