English：

With the advancement of intelligent construction technology, the emphasis on green andenvironmentally friendly practices, the prioritization of people⁃oriented concept, and the rapid economicdevelopment, future architectural designs will become increasingly diversified. Buildings withunconventional forms that align with architectural aesthetics are expected to emerge as a prevailing trend.This paper primarily focuses on the application of cross⁃disciplinary 3D scanning technology for complexcurved surface construction, specifically addressing the analysis and effective selection of point clouddata. It establishes the procedural steps for applying point cloud data fitting model technologywithin theworkflow and explores how to guide the creation of cross⁃disciplinary component solid models based on thefitting model. The research begins by analyzing the characteristics of complex curved surfaces inunconventional components and preliminarily categorizing the contour line types at different componentpositions. Subsequently, the data is segmented and processed according to the contour line types. Fordata within conventional linear ranges, effective feature points are selected, intersection points areaggregated, and component contours are output to guide lofting design. For complex curve ranges,Geomagic Design X is employed to process the corresponding complex surface point cloud data. This approach enhances both the precision and efficiency of point cloud data processing, enabling the realisticfitting of accurate and complete surface models of the main structure. Finally, based on the completesurface model of the main structure （ the preceding professional model） and in accordance with thearchitectural design intent, the study guides the completion of the aluminum panel decorative model forunconventional buildings （the subsequent interface professional model）， followed by formwork processingand extended construction. The findings of this research hold significant theoretical and practicalimplications for optimizing 3D scanning technology, data processing, and efficient point cloud data fittingin cross⁃disciplinary design, fabrication, and construction cases involving complex curved surfaces ofunconventional components.