Slight traffic accident assistant evidence collection method and system

The invention provides a slight traffic accident assistant evidence collection method and system. The method comprises the following steps: receiving an evidence trigger instruction; obtaining monitoring video information within a preset time period before the current time point; obtaining the last frame of monitoring picture information or the first frame of monitoring picture information in the monitoring video information, and marking the monitoring picture information as basic monitoring picture information; judging whether the similarity between the basic monitoring picture information and the next frame of monitoring picture information is larger than a preset similarity threshold value; if not, recording the next frame of monitoring picture information, and marking the next frame of monitoring picture information as new basic monitoring picture information; returning to the judgment step till the recorded monitoring picture information reaches first preset quantity; and sending the recorded monitoring picture information, the current time point and the current position to a traffic monitoring platform. The slight traffic accident assistant evidence collection method and system can obtain the monitoring picture information in different states in the accident happening process, so that an accident occurrence site can be restored, and the traffic accident disposing efficiency is improved.