Abstract: In the process of investigating the cause of vehicle fire, the most important step is determining the fire location and ignition point based on the fire spreading trace analysis. The premise of accurate identification of fire trace features is to be familiar with the characteristics and spread process of fire.This paper collects the propagation path and key time nodes of the fire and smoke in the process of vehicle fire spreading through the omni-directional time synchronization video monitor system developed by ourselves. It analyzes and studies the characteristics of vehicle fire spread traces, and provides effective technical support for identifying the fire location and ignition point.

Key words: vehicle fire, fire investigation, video surveillance, trace features