Vehicle front wall cross beam, vehicle body and vehicle

According to the vehicle front wall cross beam, the vehicle body and the vehicle, the vehicle front wall cross beam is used for being installed between a left front longitudinal beam and a right front longitudinal beam of the vehicle; the vehicle front wall cross beam comprises a left cross beam and a right cross beam, wherein the outer side end part of the left cross beam is used for being connected with the left front longitudinal beam; the end part of the outer side of the right cross beam is used for being connected with the right front longitudinal beam; the inner side end part of the left cross beam is connected with the inner side end part of the right cross beam, and the inner side end part of the left cross beam and the inner side end part of the right cross beam have an overlapped part. According to the technical scheme provided by the embodiment of the utility model, the left-right length of the front wall cross beam can be adjusted, so that the requirements of different vehicle types are met, the