Yongjiang Bridge in Ningbo is a double-tower-connected cable-stayed bridge which new structure system is very complex and the first one in China. In order to roundly investigate the structural behavior of the double-tower-connected, 3:40 scaled-down model test and space finite element analysis were presented. Test objective, model design principle, the ratio of similarity, test cases, loading method and the strain test point arrangement were introduced in detail. By comparison of two unfavorable test cases, most test data were quite agreeable with the theoretical data, which verified the design concept. The results indicate that the whole resistant behavior is well and the structure is safe and reliable.