This paper unleashes conventional 3D assembly mode，i.e.it adopts the top\|down design concept of Autodesk Inventor software，takes the design for lining brick of CDQ primary deduster as an example，explicates the parametric correlation design that starts from overall to local till every details.This concept will produce higher design accuracy in a shorter design period，in favor of brick quantity statistics and future design optimization，which will provide a reference for design of other industrial furnaces and their lining bricks.