Vehicle body assembly and vehicle

The utility model discloses a vehicle body assembly and a vehicle. The vehicle body assembly comprises a first edge beam, a second edge beam, an auxiliary frame and a reinforcing piece, the first edge beam and the second edge beam are connected and arranged on the same side in the width direction of a vehicle body, an auxiliary frame connecting part is formed at one end of the auxiliary frame in the width direction, and one end of the auxiliary frame connecting part is connected with the first edge beam; one end of the reinforcing piece is connected with the end of the second side beam, the other end of the reinforcing piece is connected with the other end of the auxiliary frame connecting part, and a closed ring is defined among the reinforcing piece, the auxiliary frame connecting part, the end of the first side beam and the end of the second side beam. According to the vehicle body assembly, the reinforcing piece is arranged to be connected with the second beam and the auxiliary frame connecting part so th