Rear seat backrest connecting structure

The invention belongs to the technical field of automobile seats, and particularly relates to a rear seat backrest connecting structure. A bottom support is fixedly connected with a body bottom plate and comprises a vertical plate, the surface of the vertical plate is perpendicular to a vehicle width direction, two connecting seats are symmetrically arranged at two side surfaces of the vertical plate and comprise connecting plates and supporting plates, the connecting plates lean on the vertical plate, the supporting plates are connected with lower corners of a backrest, the vertical plate is hinged to the two connecting plates through pins, and axle cores of the pins are positioned in the horizontal vehicle width direction and coincided with the bottom edge of the backrest. The rear seat backrest connecting structure is simple and reasonable, convenient and rapid to assemble, rotation of the backrest is achieved, the backrest can be effectively limited, backrest movement in the driving process of a vehicle i