Abstract: Safety of aquatic products is vital to national well-being and people′s livelihood. The assist by Beidou satellite navigation vessel monitoring system realizes traceability of trawling, which provides new means for aquaculture safety management. According to the threshold of speed and course deviation, we determined the status of trawlers and calculated the cumulative fishing time which was regarded as the fishing intensity of certain area in a period of time. Through tracing the ships, fishing grounds and harbors by ship positions, we obtained the source and cumulative fishing time of aquatic products with consideration to the information of fishing grounds and fishing areas, which realized traceability of aquatic products. This study grasped information on fishing ground location, cumulative fishing time, fishing intensity and so on, so as to realize traceability of fishing boats and source of aquatic products in fishing port accurately to a single fishing grounds.