Bearing cross beam for large-span pi-shaped beam transporting vehicle and beam transporting vehicle

The utility model relates to a bearing cross beam used on a large-span pi-shaped beam transporting vehicle and the beam transporting vehicle, and relates to the technical field of precast beam transporting machinery, the bearing cross beam comprises at least two cross beam units, each cross beam unit comprises a beam body, two adjustable transverse baffles and a locking assembly, and a longitudinal baffle is arranged on the middle area, close to the edge side, of each beam body; accommodating cavities are formed in the two ends of the beam body; the two adjustable transverse baffles are located at the two ends of the beam body respectively, one end of each adjustable transverse baffle is movably arranged in the containing cavity, the other end of each adjustable transverse baffle is located outside the containing cavity, and a baffle part is formed; the locking assembly is arranged between the adjustable transverse baffle and the beam body and used for locking or unlocking the adjustable transverse baffle and