The oil spill monitoring radar inherits the latest modern radar technology, signal transmission and storage technology, video data processing technology, geographic information and electronic chart technology, computer software technology and other advanced technologies, and can obtain fine image information of the sea surface continuously and in real time which is unable to get by ordinary radar. The system is complemented by unique and advanced software processing technology, which enables the job site and monitoring center to timely understand and grasp information about the location of the oil spill, the area of the oil spill, the drift direction of the oil film and the relative thickness of the oil film.