Front floor skeleton structure, automobile body and automobile

The utility model provides a front floor skeleton structure which comprises two doorsill beams, a front crossbeam connected between the two doorsill beams and front floor longitudinal beams. The front floor longitudinal beams are arranged between the two doorsill beams and fixedly connected with the front crossbeam and are parallel with the two doorsill beams. The front floor longitudinal beams are evenly distributed on the two sides of the front crossbeam respectively, and a front middle channel reinforcement plate and a rear middle channel reinforcement plate are connected to the two opposite sides of the middle of the front crossbeam and are parallel with the front floor longitudinal beams. Middle channel longitudinal beams are arranged on the two sides of the front middle channel reinforcement plate respectively and fixedly connected with the front crossbeam. A front floor longitudinal beam reinforcement beam is connected between the rear middle channel reinforcement plate and each of the front floor longitudinal beams. A seat mounting plate is connected between each of the front floor longitudinal beams and the corresponding doorsill beam. The utility model further relates to an automobile body comprising the front floor skeleton structure and an automobile comprising the automobile body. The front floor skeleton structure can improve the structure strength and rigidity of a whole front floor, and lowers the risk that the front floor is deformed during a collision.