Floor longitudinal beam connecting structure

The utility model discloses a floor longitudinal beam connecting structure which comprises two longitudinal beams and three cross beams, the two longitudinal beams are symmetrically arranged, the three cross beams are fixedly connected between the two longitudinal beams, a locking device is arranged between the longitudinal beams and the cross beams, and the locking device is provided with a groove-shaped frame, a cross plate, a groove-shaped plate, a reinforcing rod and a fixing sleeve. The device has the advantages that the two transverse plates penetrate through the two groove-shaped frames, the groove-shaped plate is erected on the two transverse plates, the fixing nuts are connected to the fixing screws in a sleeving mode to extrude the groove-shaped plate, and therefore the two transverse plates are pressed and fixed through the groove-shaped plate, the two groove-shaped frames can be fixed to the longitudinal beam through the two transverse plates, and the groove-shaped plate is fixed to the longitudin