Abstract: Against the four kinds of main fire cause of new energy electric vehicle, the method and key points of fire investigation inquire was put forward, the site investigation steps and survey points of each parts of new energy electric vehicle were analyzed, and the investigation method of new energy electric vehicle fire were summarized. By analyzing the battery failure fire spreading trace, identifying the fire location, deciding the battery cell on fire, the identifying method of battery cell combustion trace was summed up. The study can provide reference for electric vehicle fire.

Key words: new energy electric vehicle, fire investigation, site investigation, identification of material evidence