关键词: 医案, “内生五邪”, 分类, 随机森林

Abstract: The paper focus on the knowledge mining of TCM “five pathogens produced by five organs” in the medical corpus by random forests.Firstly，the intelligent diagnosis classification model of “five pathogens produced by five organs” is established.Secondly，an improved feature importance estimation method based on the random forests is applied to evaluate the importance of features for each class.Empirical study shows that the model used is effective and advantageous，and can be competent for exploration the thorough and meticulous conclusion of the fire，heat，wind，cold，damp and body fluid.The proposed method provides excellent decision-making tool for TCM clinicians.

Key words: medical records, five pathogens produced by five organs, classification, random forests