Telescopic box girder hoisting hole mold

The utility model belongs to the technical field of building construction, and particularly relates to a telescopic box girder hoisting hole mold, which solves the problem of interference of a traditional hole forming mold in the automatic operation process of a concrete rolling and plastering system, and comprises a mold barrel and a U-shaped hoop, a vertically-arranged threaded rod is fixed to the bottom of the mold barrel, a horizontally-arranged disc with holes and a supporting plate are fixed in a cavity of the mold barrel, the supporting plate is arranged at the bottom of the mold barrel, the disc with the holes is arranged at the position close to an opening in the top of the mold barrel, and two holes are symmetrically formed in the disc with the holes. A stirrup of a U-shaped hoop with a downward opening penetrates through each hole, and the end part of the stirrup of the U-shaped hoop is connected with a limiting nut. The device does not affect the smooth passing of a rolling system and a plastering