Car body rear floor assembly skeleton structure and car body

The utility model provides a car body rear floor assembly skeleton structure. The car body rear floor assembly skeleton structure comprises two oppositely-arranged rear floor longitudinal beams. A plurality of rear floor beams arranged at intervals are connected between the two rear floor longitudinal beams. At least one pair of beam connecting plates are connected between every two adjacent rear floor beams. At least one rear end connecting plate is connected to the position, close to the rear end of each rear floor longitudinal beam, of each rear floor beam. The rear end connecting plates are arranged in the length direction of the rear floor longitudinal beams and extend towards the rear ends of the rear floor longitudinal beams. The utility model further provides a car body provided with the car body rear floor assembly skeleton structure. According to the car body rear floor assembly skeleton structure, the intensity of a car body rear floor assembly can be improved, the energy transmission mode of the rear floor assembly in the collision process is changed, and the breakage risk of the rear floor assembly is lowered.