With the increasing output of new energy vehicles, higher requirements are put forward for automotive plastics. On the basis of accurately understanding the advantages and applicable conditions of various new plastic materials, according to relevant standards, it is of great significance for the development of new energy vehicle manufacturing industry to design and apply them to new energy vehicles. Taking bio-plastics and carbon fiber reinforced plastics as examples, based on the analysis of the physical and chemical characteristics of new plastic materials, it discusses the application status and prospect of new plastic materials in the design of new energy vehicles. Future development direction of new plastics refers to develop new plastics and expand their application types through more innovative research and development of new plastics modification technology with its performance improvement so as to be applied in more structural parts in new energy vehicles.