By collecting, sorting and summarizing modern clinical research and ancient books on the treatment of Henoch-Schonlein Purpura Nephritis with traditional Chinese medicine for huoxuehuayu, and using data mining techniques such as frequency analysis, cluster analysis and association rule analysis, researchers simplify and refine the practical application and medication rule of traditional Chinese medicine formulae for huoxuehuayu in children with Henoch-Schonlein Purpura Nephritis， in order to provide evidence-based medicine basis and clinical reference value for the treatment of this disease.