The invention relates to an all-round highway vehicle detection system, which comprises a plurality of information acquisition modules, a communication module and a central platform, wherein the plurality of information acquisition modules are used for acquiring information of vehicle on each lane of the highway, judging whether vehicle violation happens and generating a violation evidence; the communication module is used for transmitting the violation evidence generated by the information acquisition modules to the central platform; and the central platform is used for storing the violation evidence generated by the information acquisition modules, carrying out data analysis and processing and providing a user query and reading function. By adopting the all-round highway vehicle detection system provided by the invention, functions of small vehicle lane occupancy capture for a large vehicle, illegal vehicle capture for emergency lane occupancy, over speed vehicle capture, low-speed vehicle capture, interval speed measurement, high-definition image tampering prevention, vehicle feature recognition, high-definition video recording, automatic device state detection, automatic anomaly diagnosis and recovery, device power safety and lightning protection, theft prevention and alarming.