The invention relates to the technical field of vehicles, and discloses a floor framework, a seat
assembly, a floor
assembly and a vehicle, a seat front cross beam, a seat rear cross beam, a first side reinforcing part and a second side reinforcing part are integrated to form the integrally formed floor framework, the number of parts of the floor framework is reduced, and the cost is reduced. Connection between mutually independent parts is omitted, so that the forming process of the floor framework is simpler, and the
processing efficiency of the floor framework is improved; the integration degree of the floor framework can be improved, the size control of the floor framework is more accurate, the size precision is improved, and size errors caused by
welding of independent components are avoided; the connecting strength of the seat framework, the seat front cross beam and the seat rear cross beam can be improved, and the safety and reliability of the floor framework are improved; and the performance of the area near the seat can be improved, and the
user perception experience is improved. By arranging the second side reinforcing piece, the structural strength, the anti-collision performance, the reliability and the stability of the whole floor framework can be improved.