In order to study the stability analysis on slanting type tied-arch bridges with steel box arch ribs (five arch ribs), relying on the project of diverting the Huaihe River from the Yangtze River, the through slanting type arch bridge-Chuangxin Avenue Bridge, the suspender cable force detection was carried out on the slanting type arch bridge after completed bridge, a finite element model of the tied-arch bridge on slanting type tied-arch bridges with steel box arch ribs considering the geometric and material nonlinearity was established. The former evaluated the overall tensioning control effect of the bridge suspenders and the latter verified the reliability of the tit over-arch model, then the stability of the tilt-over-arch bridge was studied. The results show that:(1) the maximum error between the measured and designed values is 3.91%, and the overall tensioning control effect of the tilt-over-arch bridge is good. The maximum error between the measured and simulated values is 0.63%, which verifies the reliability of the model; (2) the stability coefficient of the arch bridge structure during the whole construction process meets the engineering requirements, and the slanting type arch bridge with steel box improves the stability by 72%; (3) the elastic stability depends on the difficulty of the out-of-plane instability of arch rib, and the initial geometric defects have a great influence on the stable bearing capacity of the slanting type tied-arch bridge. In addition, the cooperative work of the slanting arch ribs and the wind bracing can significantly improve the stable bearing capacity of the structure; and (4) the design suggestions for this type of tied-arch bridge are given, which can provide a reference for the construction and design of similar projects.