Construction method of prefabricated box girder for bridge

The invention relates to a construction method of a prefabricated box girder for a bridge. The construction method comprises the step of mounting the prefabricated box girder mold for the bridge. Installation of the prefabricated box girder mold for the bridge at least comprises the following steps that a plurality of distribution girders are arranged according to the size of a prefabricated box girder for the bridge; a plurality of first partition plates are laid on the distribution beams; and second partition plates are laid on the two sides of the first partition plate, so that the first partition plate and the second partition plates form an outer mold of the prefabricated box girder mold for the bridge. The second partition plates and the first partition plates are connected to form included angles, and the adjacent second partition plates are in lap joint through the protruding parts. And a connecting piece is arranged on the protruding part of the second partition plate. The adjacent second partition p