Dongfeng Renault multi-type welding line project will be summarized in this article.And we will focus on the new process scheme,process layout and its program features applied in the Dongfeng Renault project,and the realization of multi-variety model mixed-flow production.A variety of solutions were introduced and the features of each line in the project were explained.This will provide a high reference value for the development of welding lines for many types of similar types of welding equipment in the future.