Steam curing type manufacturing method of concrete box girder

The invention relates to a steam curing type manufacturing method of a concrete box girder, which is completed through a box girder production line, and the box girder production line comprises a track, a trolley connected to the track in a sliding manner, a curing chamber arranged at one end of the track and a box girder mold arranged at the other end of the track, the concrete box girder production process comprises the steps that a box girder placed on a trolley bottom plate is poured at the position where a mold is located through a box girder mold, the box girder is conveyed into a curing chamber through a trolley, and steam is output through a steam spraying nozzle to cure the box girder. During maintenance, the front elastic sealing piece, the left elastic sealing piece and the right elastic sealing piece abut against the trolley bottom plate in a sealed mode so that steam can be prevented from falling to the ground. The steam curing device has the advantages that the steam consumption can be reduced,