Abstract：Objective：Through collecting and sorting out the outpatient chronic pharyngitis cases of Professor LI Shuliang，and data mining based on the Traditional Chinese Medicine Inheritance Support System （V2.5），the ideas of Chinese medicine differentiation and treatment and medication rules of Professor LI in treating chronic pharyngitis were discussed. Methods： Medical records of patients with chronic pharyngitis treated in Professor LI's outpatient Department of Otorhinolaryngology in Xiyuan Hospital of China Academy of Chinese Medical Sciences from 2016 to 2019 were collected by retrospective study. The medical records meeting the inclusion criteria were recorded； a prescription database was established， and statistics of medicinal frequency， association rule analysis and entropy cluster analysis were conducted respectively. Results：The study included 215 cases and 216 prescriptions，involving a total of 156 kinds of Chinese medicinals，and the frequency of use of Chinese medicinals was 3 114 times. In terms of four qi， the Chinese medicinals were mainly cold and warm， in terms of five flavours， the Chinese medicinals were mainly sweet and bitter， and the main channel entries were lung， stomach and spleen channels. There were 12 core groups of Chinese medicinals and 6 new prescriptions. Conclusion： Professor LI pays attention to the differentiation and treatment of the lung，spleen and stomach in treating chronic pharyngitis，takes scattering the wind as the first， makes good use of the sweet-cold medicinals to clear heat，and pays attention to banking up earth to generate metal.