Journal of Data Processing Xinde Yang, Jieru Xie 7 2 2017 http://www.dline.info/jdp/fulltext/v7n2/jdpv7n2_2.pdf The integrated system technology from the point of view, follows the principles of the software engineering with .Net framework, the ASP web design technology, data mining technology, the XML data description and manipulation techniques which helps in legal business training system application. Using the prototype method and object-oriented system analysis method, a comprehensive analysis of the legal practice teaching business functional requirements, performance requirements and environmental needs and design principle of system design, for system expansion requirements are fully considered. In the system outline design part, we introduced the system overall plan, the software system structure design, the data mining design, the network structure and the function structure. The main functions of the system are further described. The paper discusses the application of information technology in the legal field, constructed the study of Web technology based on network teaching platform, and constructed the design idea of legal training network teaching platform. B/S mode and the main application of technology enables the law information resource research based on data mining technology and XML sharing. Research on data mining principle, using the data mining algorithm and the data mining experiments were carried out to study the algorithms of the main functional modules and points out the theoretical and practical significance of research on the application of information processing technology. The computing machine in legal practice teaching is explored, with the active use of auxiliary legal training of network teaching in the legal profession training platform, where the innovative spirit and practical ability of students has made a meaningful attempt.