Xili caohe bridge is 777.20 meters, middle three holes (55 + 90 + 55) for hanging basket construction, the other for 30 meters precast girder. Before the acceptance of self-inspection process found all bridge rubber bearing aging serious, after many experts decided to demonstrate the whole bridge precast girder parts adopt hydraulic synchronous jacking technology to the bridge overall structure of synchronous jacking after replacing all rubber bearing.