Based on the segmental catenary theory and considering the change of absolute position of main cable saddle before and after pushing, a method for determining pushing value was proposed, which can help the bridge tower top reach the specified deviation after pushing. A comparative analysis was conducted on the changes of the top deviation of the bridge tower under different pushing values, as well as the ratio of the absolute position change of the main cable saddle to the pushing value for each pushing, by using finite element software, and the proposed method was applied to determine the pushing value of the over-pushing scheme. The results show that based on the pushing value calculated by this method, the top deviation of the bridge tower can reach the specified value after pushing or at a certain construction stage after pushing, which provides a reference for precise control of the top deviation of bridge tower in the pushing construction for cable saddle of suspension bridges.