The invention discloses a data mining system for an AIS information source based on a big data platform. The data mining system comprises a data acquisition system, a data storage system, a data mining system and a data analysis system, wherein the data storage system is a distributed storage system, and the data mining system comprises the classified statistics of the data, the target motion characteristic analysis, the target density distribution analysis, the target track distribution analysis, the activity rule analysis and the abnormal behavior detection analysis. According to the data mining system, the tasks are mined through AIS data, such as the track mode mining, the track uncertainty, the abnormal value detection, the stay points and the classification. For example, the abnormalvalue detection can find an abnormal behavior ship, the classficiation helps to analye the joint features, such as navigation conditions, etc., of different types of ships, and the stay point detection can help to determine a hot spot port and laterally understand the import and export trade indexes of the port.