Auxiliary device for tensioning cross beam of fish-bellied box girder

The utility model relates to a fish-bellied box girder cross beam tensioning auxiliary device, which is used for solving the technical problems that the efficiency of conveying a jack and other tensioning devices to a tensioning position is restricted and the cross beam tensioning efficiency is influenced when the jack and other tensioning devices are conveyed by adopting a bracket erecting method. Comprising two guide rails which are opposite and consistent in trend, a plurality of embedded bolts used for being embedded in a flange plate, two parallel mounting rods and a loading box capable of being opened and closed, wherein part of the embedded bolts are distributed in the length direction of one guide rail and each embedded bolt is detachably connected with the guide rail through a nut, and the other part of the embedded bolts are distributed in the length direction of the other guide rail and each embedded bolt is detachably connected with the guide rail through a nut. The two ends of each installation r