Therefore, the video surveillance system is the basis and guarantee for the smooth law enforcement of public security. Under the background that the current traffic law enforcement environment tends to be complicated and the people's expectations for public security personnel to standardize law enforcement are increasing, it is an inevitable choice for grass-roots public security traffic police departments to further enhance the credibility of law enforcement and popularize the use of modern scientific and technological law enforcement equipment. With the rapid development of video surveillance technology, users have higher and higher demand for mobile surveillance while satisfying wired surveillance, especially for governments, enterprises, institutions and special industries that have been working outdoors for a long time. Traditional wired monitoring can no longer meet the needs of dealing with outdoor emergencies and special events. Mobile video surveillance can get the information of emergencies in time and accurately, conduct correct command and dispatch according to the pre-established plan, and reduce the losses caused by emergencies to a very low level, which is increasingly favored by the government and enterprises. Law enforcement recorder is a portable law enforcement forensics equipment with synchronous audio and video recording function, which provides an important guarantee for collecting and fixing evidence in time, recording the on-site disposal of various incidents, realizing fair law enforcement and civilized duty, protecting the legitimate rights and interests of police and parties, ensuring the police to perform their duties according to law, promoting the improvement of law enforcement level and supervising law enforcement behavior. In the existing public security system, fixed cameras or monitoring equipment are still used for sampling and evidence collection in the process of law enforcement, which is not in line with the principle of real-time and flexibility in public security field law enforcement. It is particularly important to systematically update the law enforcement record system of the Public Security Bureau. The degree of integration, storage and utilization of law enforcement videos is one of the important signs of the informatization degree of public security law enforcement. Most public security systems have built a large number of law enforcement monitoring systems belonging to different departments, based on different standards, different equipment and different platforms. However, these resources have not been effectively integrated at present, and cross-platform and cross-departmental centralized optimization cannot be carried out, resulting in low utilization rate and repeated backup of existing public security law enforcement video resources.