It　is　vital　to　promote　and　optimize　the　technological　innovation　efficiency　of　new　energy　vehicle　(NEV)　enterprises　for　the　green　transformation　of　China＇s　automobile　industry.　However,　China＇s　NEV　enterprises　still　have　problems　such　as　insufficient　research　of　technology　and　unreasonable　innovative　resource　allocation.　To　improve　the　technological　innovation　efficiency　of　China＇s　NEV　enterprises,　the　NEVs＇　technological　innovation　process　is　divided　into　two　stages:　the　research　and　development　(R&D)　stage　and　the　achievement　transformation　stage　in　this　research.　Combining　Tobit　regression　with　data　envelopment　analysis　(DEA),　an　evaluation　framework　of　technological　innovation　efficiency　of　the　NEV　enterprises　is　constructed.　Then,　the　innovation　efficiency　of　23　NEV　listed　enterprises　from　2013　to　2018　is　analyzed.　The　result　reveals　three　findings.　First,　the　overall　technological　innovation　efficiency　of　NEV　enterprises　is　low.　Second,　enterprises＇　R&D　efficiency　is　generally　higher　than　the　achievement　transformation　efficiency.　Third,　according　to　two-stage　efficiency,　23　NEV　enterprises　are　divided　into　four　categories.　For　different　types　of　enterprises,　targeted　guidance　to　improve　innovation　efficiency　is　proposed.　This　research　provides　a　theoretical　and　practical　basis　for　improving　the　innovation　efficiency　of　NEV　enterprises.