Tensioning protection device for overpass bridge box girder

The utility model discloses a tensioning protection device for an overpass bridge box girder, which comprises a pre-tightening bottom plate, the surface of the pre-tightening bottom plate is uniformly provided with reinforcing steel bar holes I for tensioning reinforcing steel bars of the overpass bridge box girder, the inner walls of the reinforcing steel bar holes I are inserted with protective jackets I, the protective jackets I are used for locking the reinforcing steel bars, one end of each protective jacket is a plug, and the other end of each protective jacket is a plug. Protective sheets are arranged at the tail ends of the first protective sleeves, the protective sheets are evenly distributed and fixedly connected to the outer wall of the plug, notches are formed between the adjacent protective sheets, a pre-tightening push plate is arranged on the outer side of the pre-tightening bottom plate, and second steel bar holes used for tensioning overpass bridge box girder steel bars are evenly formed in t