Abstract: In view of problems of high repetition rate and low efficiency of structure design of scraper conveyor, parametric modeling of key components and complex assemblies of scraper conveyor were realized based on Pro/E 5.0 three-dimensional modeling software. Parametric modeling of key components of scraper conveyor mainly includes three steps: 3D model creation, design parameter determination and relationship setting. The parametric modeling process of key components was introduced by taking parametric modeling of drive sprocket as an example. Parametric modeling of complex assemblies of scraper conveyor was implemented based on Pro/Toolkit secondary development technology and Visual Studio 2008. Parametric modeling and virtual assembly process of complex assembly was introduced by taking parametric modeling of middle slot of scraper conveyor as an example. Rapid establishment, modification and precise sculpting of the key components and assemblies of scraper conveyor were achieved by modifying important geometric parameters, which provides basis for structural optimization of scraper conveyor.