Heavy-load flat car with brake and capable of being erected

The erectable heavy-load flat car with the brake comprises a flat car body, a brake mechanism and a dragging assembly, the dragging assembly is arranged on the upper portion of the flat car body, the brake mechanism is arranged at the bottom of the flat car body, the brake mechanism comprises a first transverse plate, two sets of inserting holes are formed in the two ends of the first transverse plate, and two sets of first base plates are arranged on one side of the first transverse plate in a bent mode. One side of the first transverse plate is provided with a second base plate in a bent mode, an I-shaped plate is inserted into the two sets of inserting holes, square inserting grooves are formed in the I-shaped plate, the same transverse rod is inserted into the two sets of square inserting grooves, first round holes are formed in the two ends of the transverse rod, and baffles are clamped into the two sets of first round holes. According to the flat car braking device, the stopping rod is matched with the