| In the paper, construction controlling on long span bridge both domestic and abroad was reviewed and it's status is analyzed at first, then the theory, method and contributing factor of bridge construction controlling was recommended; at last the analysis and accounting method of structure modeling, to be considered in structure analyzing, function of the software "ANSYS" and the method in which the "ANSYS" was used to analysis and account the bridge construction process were discussed in-details.Aiming at main project of the Xiaoxihu bridge, a low pylon cable-stayed bridge, based on the existing theory and method of the bridge construction controlling theory, using the basic function of "ANSYS", farther exploitation was done on concrete elasticity and creep calculating distinguishingly, nonlinearity analysis theory was used to construct the space model, the main beam, string pylon and abutment were simulated by the beam elements which was considered the shearing effect. Which is worthy of considering that using the geometric non-linear truss elements to simulate the stayed-cable, form traveler is modeled as structure elements and participate in stress analysis. Four stages are used to model the construction stage, which are: (1) the erection of form traveler; (2) placing the segmental concrete; (3) jacking the tendons; (4) tensioning the stay cables. The construction controlling system, consisting of structure analysis system, testing system, error estimation system and results prediction system is induced. Some useful results are get, which can be used to guide the future construction projects. In the end, the problems exists are also given in details, which shall be solved in the future.
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