Body-connecting structural beam

The invention relates to a body-connection structural beam, comprising a left connection plate, a middle section connection beam and a right connection plate; The left end of the middle connecting beam is connected with the left connecting plate, and the right end of the middle connecting beam is connected with the right connecting plate. The other end of the left connecting plate is connected with the structural beam of the sill inner plate; The other end of the right connecting plate is connected with the reinforcing beam of the central passage; The stiffness and strength of the left connecting plate, the middle connecting beam and the right connecting plate are different. by arranging a back crossbeam of a front-row seat to be in a three-section structure, according to the different forces, the rigidity and strength of different sections are improved, so as to realize the local accurate weight loss and reduce the manufacturing cost. Moreover, when the vehicle model is widened, onlythe length of the connect