Movable reaction equipment for shield launching shaft

Movable reaction equipment for a shield launching shaft comprises a girder provided with a rectangular frame, wherein the girder is perpendicularly placed on a track of a launching bracket in the shield launching shaft, and the front side of the girder is connected with a reference steel ring through welding, the back side of the girder is connected with a flange at the front end of a horizontal support tube, a flange at the back end of the horizontal support tube is closely attached to a pushing back wall of the shield launching shaft, the horizontal support tube is formed by flanged connection of one section of steel tube or at least two sections of steel tubes, and the length of each steel tube is smaller than the travel of a shield machine jack; and the front side of an embedded support piece on a bottom plate of the shield launching shaft is in threaded connection with the tail of an anti-reverse jack. The equipment is low in construction cost, simple and convenient to construct, high in construction efficiency, short in construction period and low in risk when being used for performing launching construction of the shield launching shaft.