Abstract: Decision tree is one of the most frequent used model on classification and prediction in the data mining,which can provide clear and classified result from massive data. Referring to the author's former research, this paper presents in -depth analysis on Shuanghuanglian Injection, Potassium Dehydroandrogrpholide Succinate Injection (Chuanhuning Injection) according to the decision tree method, of which the fundamental concepts and application prospects in the pharmacovigilance were introduced.

Key words: data mining, decision tree, pharmacovigilance