Steel self-anchored suspension cable-cable-stayed cooperative system bridge

The invention discloses a steel self-anchored suspension cable-cable-stayed cooperative system bridge. The steel self-anchored suspension cable-cable-stayed cooperative system bridge comprises a main tower, a side-span bridge pier, a girder, a main cable, a stay cable and a suspender, the girder is supported by the main tower, side-span bridge pier, main cable and stay cable, the middle of the girder is connected with the main cable through the suspender, and the girder is a steel box girder. The steel self-anchored suspension cable-cable-stayed cooperative system bridge solves the problem of large axial force of a girder of a large-span self-anchored suspension cable-cable-stayed cooperative system bridge through using the steel box girder for the self-anchored suspension cable-cable-stayed cooperative system bridge. Because the steel self-anchored suspension cable-cable-stayed cooperative system bridge uses the steel girder as the girder, the weight is light, the spanning ability is strong, and the construction speed is fast.