Prestress rib tensioning equipment, system and method and concrete continuous box girder

The invention relates to prestress rib tensioning equipment, system and method and a concrete continuous box girder. A prestress rib is tensioned by using the tensioning equipment comprising a jack, a tensioning mechanism and a locking mechanism; the tensioning mechanism comprises a tensioning rod and a pressure-bearing member; the tensioning rod penetrates through a cylinder body of the jack and a rotating sleeve of the locking mechanism; one end of the tensioning rod is provided with a connecting part for being connected with the prestress rib, and the connecting part is positioned in the rotating sleeve; and the pressure-bearing member is arranged at the other end of the tensioning rod and abutted against the cylinder body. The invention realizes tensioning and anchoring by connecting the tensioning rod with the prestress rib and combining the jack and the locking mechanism, can realize tensioning and anchoring by one-step tensioning process, is convenient for the prestress application, simplifies the construction procedure of a railway bridge culvert and ensures the engineering quality.