Rear supporting leg and bridge girder erection machine

The utility model provides a rear landing leg and bridge girder erection machine relates to bridge girder erection equipment technical field, the rear landing leg includes support beam and landing leg structure, the bottom of support beam is provided with two landing leg structure at interval, the support beam is used for supporting the girder of bridge girder erection machine, and the support beam is used for supporting the girder of bridge girder erection machine. The supporting leg structure comprises a support structure, an adjusting supporting leg, a jacking oil cylinder and a base structure, the fixed end of the jacking oil cylinder is connected to the support structure, the telescopic end of the jacking oil cylinder is connected to the adjusting supporting leg, and the base structure is connected to the end, away from the direction of the jacking oil cylinder, of the adjusting supporting leg. The base structure is used for making contact with a pier. Compared with a traditional rear supporting leg of a