Abstract: Integral jack-up is a new technique used to renovate bridge. Taking Shanghai Pudong east approach bridge section as an example, a numerical model for bridge jacking process was built to simulate the construction process. Stress analysis on upper structure of bridge was implemented under six kinds of adverse jacking operations. Uneven jacking produces a greater additional stress between pier roof girder and the main beam horizontal linkages. Scenario five is the most unfavorable situation close to the limit stress. Numerical Simulation verifies the security of the project and gives a reasonable construction proposal.