Abstract: XML is a technology for representing and exchanging data on different platform.Due to its advantages of self-description，opening etc，XML has become as an industrial standard in a short time.The large amount of XML data emerges and a new challenge to data mining is given.Traditional mining methods of association rules rely on the relational database，viz.mapping the XML documents into relational databases.A class interface for mining association rules from native XML data based on FP-growth algorithm is given and implemented using Java in the J2EE platform.