The utility model relates to a buoyage for oil spilling tracing and positioning and real-time monitoring of water surface oil film contamination. The buoyage comprises a buoy shell, wherein an oil film detection sensor is arranged outside the buoy shell, and a detection module electronic device assembly is arranged in the buoy shell. The buoyage further comprises a remote monitoring platform. A sensor is a conductive oil film detection sensor. The detection module electronic device assembly generates alternating-current signals to apply a voltage to the conductive oil film detection sensor, and collects and processes the signals. The oil film detection sensor is a conductive oil film detection sensor and can judge whether information of oil film contamination exists and collect and process the information. The buoyage for oil spilling tracing and positioning and real-time monitoring of water surface oil film contamination is novel in design and concept and unique in structure, and aims at quickly finding a possible water surface oil contamination position and obtaining contamination data for an oil spilling accident emergency reaction, commanding and decision-making department and providing an advanced water surface oil spilling electronic information means for implementation of contamination control conducted by the department.