The invention discloses a hydraulic fabricated crossing structure, which comprises a structure body, a safety net device, rotating arm mechanisms and hydraulic jacking mechanisms, wherein the structure body comprises a plurality of upright posts and beam components; the safety net device comprises a carrying rope, a circulating rope, a safety net, insulating stay bars and sling members; each rotating arm mechanism comprises a rotating arm and a magnetic docking device; and each hydraulic jacking mechanism comprises an oil station, an oil cylinder and a jacking platform. Stabilization of the structure body is achieved through stay wires; each upright post is stabilized by upper and lower layers of stay wires; four stay wires are unevenly distributed on each layer; the upper layer of stay wires are located at the lower parts of rotary assemblies of the upright posts; and the lower layer of stay wires are located close to the center positions of the waists of the upright posts. According to the hydraulic fabricated crossing structure, the shock resistance of the crossing structure is improved by the measures of optimizing the overall structure of the crossing structure, adopting a high-strength steel material, adding a buffer force reliever, reasonably arranging the stay wires and the like; meanwhile, lightweight, fabricated and automatic design is carried out; and the 'hydraulic fabricated crossing structure' can meet the requirements of field construction.