The work aims to study the packaging design methods of export products to ensure that the export products of transmission line fittings reach the destination safely. The method of sort packaging design was used to classify the export products of transmission line fittings according to variety, material, quality, size and so on. According to the different characteristics of categories, the packaging design was specifically carried out. In the packaging design process of specific categories, CAD and other mapping software were used to simulate arrangement and trial assembly to determine the overall dimension of the package. Through the sort packaging design of transmission line fittings and simulation of arrangement and trial assembly, reasonable product packages were designed targeted to different varieties. The export products were safely arrived at the destination and the cost of packaging was saved. For the packaging design of transmission line fittings, the sort packaging design and simulation of arrangement and trial assembly method are feasible.