To meet the demands of today's market fast fine design and to solve the bulk material conveying machinery's problem of long cycle of product design and slow process of optimization, we developed a platform of rapid design system for bulk material conveying machinery. Taking the bucket and wheel body of a company's bucket wheel mechanism as an examples, we firstly built parametric dimension driven design models, and then used the finite element analysis software to establish multi-objective optimization models based on the principle of parametric, realized the quick optimization of product design, and improved the design efficiency and the accuracy of the complex steel structure. Finally, the parametric design and parametric analysis of the optimization module were highly integrated and the rapid design system platform was completed. Users can use the interactive interface of the rapid design system platform input parameters to get the product they need. The example has indicated that the rapid design system has good application prospects in the serialization development of bulk material conveying machinery.