The utility model discloses a bed -jig structure for T roof beam reinforcement, including being used for bearing the weight of T girder iron bones RACK's concrete pedestal, a concrete pedestal lateralpart is equipped with a plurality of locating racks that are used for fixing a position T girder iron bones RACK's branch arrangement of reinforcement position that are even interval arrangement, andthe locating rack is equipped with in the last lower part that is close to concrete pedestal one side and is used for fixing a position T girder iron bones RACK's the vertical stirrup and the locating plate of horse's hoof muscle position. This bed -jig structure has the advantage that construction convenience, low cost, durability are strong, can improve beam manufacturing quality and progress.