Concrete box girder internal mold

The utility model discloses a concrete box girder internal mold which comprises a box girder internal mold body, a supporting assembly is installed on the box girder internal mold body, the supporting assembly comprises a supporting plate and an inner rod, a telescopic assembly is installed on the outer side of the inner rod, the telescopic assembly comprises a sliding rod and a sliding sleeve, a stabilizing assembly is installed on the sliding sleeve, and the stabilizing assembly is connected with the supporting plate. According to the concrete box girder internal mold, pressure can be transmitted to the sliding sleeve at the top through the connecting rod and the batten by means of the sliding sleeve, and then the box girder internal mold body synchronously expands and contracts in the vertical direction; therefore, the size inconsistency of the hollow structures is guaranteed, the construction quality of concrete members is guaranteed, the splitting work of the box girder inner mold body and the steel mold