Quick release type prefabricated highway small box girder inner mold, demolding tool and demolding method

The invention discloses a quick-release type prefabricated road small box girder inner mold, a demolding tool and a demolding method, and relates to the technical field of prefabricated road small box girder construction molds.The quick-release type prefabricated road small box girder inner mold comprises a plurality of sets of mutually-connected main body modules, connecting modules are connected to the outer side faces of the two main body modules located at the two ends, and variable cross-section modules are connected to the outer side ends of the connecting modules; the outer side end of the variable cross-section module is connected with an end module; wherein the variable cross-section module and the connecting module are matched and connected in series with the end part module and the main body module, the structural change of front and back necking deformation is coped by designing a modularly-combined inner mold, the variable cross-section module is arranged at the deformation part for molding a nec