Abstract: With the deep integration of information technology and transportation infrastructure development, the application field and digital construction for bridges are continually expanding. The complex bridge structures represented by the large-span curved cable-stayed bridges have the characteristics of massive scale, varying atypical structures, and complex spatial geometries, which have constrained the application of BIM technology in large-span complex bridges. For the extra-large cable-stayed bridge of space irregular curve, which has the smallest radius of curvature in China, the Dynamo visualization programming techniques are introduced to study the model creation and automated layout system for adapts parameters of small box girders. And an integrated end-point control method for cable-stay modeling and layout is proposed. This method enabled the automated layout of data-driven discrete precision point control for the complex components of large-span curved cable-stayed bridges. The results show that this method significantly enhances the precision, accuracy, and efficiency of parametric modeling for large-span curved cable-stayed bridges. Compared with traditional methods, the centerline error of the box girder is effectively controlled within 2mm, the slope calculation accuracy is improved to 0.1%, and the modeling efficiency is increased by 76%. This provides a reference for the application of BIM technology in parametric intelligent modeling of long-span complex bridges.