Collaborative innovation is an urgent need for the sustainable development of China's new energy vehicle industry, but there are some problems of collaborative innovation such as “connection but not integration”. In order to systematically study the process and selection strategy of collaborative innovation mode of new energy vehicle enterprises, systematic research idea of “overall description-role and selection process analysis-strategy summary” was followed, and BAIC BIEV as the research object was selected. By analyzing the current situation of collaborative innovation of enterprises, the practical process of the multiple collaborative innovation modes affecting its performance was studied, and the strategic combination of collaborative innovation mode selection at different stages of development was showed. These provide some reference for other new energy vehicle enterprises.