Support bending moment balancing device for incremental launching construction

The utility model provides a support bending moment balancing device for incremental launching construction, which is used for incremental launching construction of a steel box girder and comprises an existing building, a supporting surface is formed on the surface of the existing building; the temporary support is located on the supporting face of the existing building and fixed to the existing building. The pushing support is fixed on the temporary support, and the pushing support is fixed on the temporary support; the prestress monitoring assembly is located above the temporary support and is arranged close to the pushing position of the steel box girder, and the prestress monitoring assembly is used for monitoring prestress transmitted to the temporary support by the pushing support in the pushing process of the steel box girder; the force application assembly is located at the bottom of the temporary support and connected with a driving mechanism used for generating transverse acting force. A storage uni