Thestructuresystemofmoderncable-stayedbridgesiscomplex， and the cableforces in construction stage and completion stage directly affect the stress state and align-ment of the structure.To solve the problem of reasonable completion state and reasonableconstruction state of cable-stayed bridge， aimed at overlapping beam of cable bridge withtwin towers， the MOP SO optimization algorithm is used to optimize the cable forces in theconstruction stage.Python programming language and finite elementsoftware are usedtocompile the optimization program.The least bending strain energy of towers and beams andthe alignment of main towers are selected as the optimization objectives.The constructionprocess of the structure and the safety state after completion of the bridge should be sat is-fied， and the overall distribution of cable forces should be uniform.The optimization resultsshow that the method can quickly search for multiple optimization results and further filterfor decisionmakers.The optimized structural stress state and the maintower bridge lineshape are reasonable， and the cable force distribution is relatively uniform， avoid the second-ary adjustment after completed bridge， and reasonable completion state and construction state ofcable bridge with twin towers are determined.