As a material handling equipment using chain as driving and bearing element,chain conveyor has the characteristics of diversified design,large bearing capacity and durability.With its superior performance and adaptability to various complex working conditions,chain conveyors have been widely used in manufacturing,mining,logistics and other industries.In this paper,the application of dynamic block in parametric design of chain conveyors is discussed.Through comparative analysis,the advantages of dynamic block in improving design efficiency,optimizing product performance and simplifying design process are demonstrated in detail.Parametric design combined with the introduction of dynamic block in defining each design element of chain conveyors greatly improves the efficiency,accuracy and flexibility of design.The use of dynamic blocks can not only enable designers to quickly adjust and optimize the design scheme to adapt to different working conditions and functional requirements,ensure the consistency and repeatability of the design,but also reduce the manual intervention of designers and automatically complete complex design modifications,thus greatly improving work efficiency and design quality.