To mine the medication rules of professor WANG Shouchuan in treating tonsillitis in children and provide references for the selection of prescriptions and ideas in clinical treatment.Methods:The clinical records of tonsillitis in children treated by professor WANG Shouchuan were collected.Data mining was carried out by frequency analysis，association rule analysis，and cluster analysis.Results:A total of 161 patients were included，and 461 effective prescriptions were collected，involving 153 Chinese medicines.High-frequency Chinese medicines included Taraxaci Herba，Phragmitis Rhizoma，Platycodonis Radix，Polygoni Cuspidati Rhizoma et Radix，Mori Cortex，Lonicerae Japonicae Flos，and Astragali Radix.The Chinese medicines were classified into 19 types according to the functions including heat clearing，phlegm resolving，cough stopping，and asthma relieving，exterior releasing，and tonifying.The Chinese medicines used were mainly cold，with sweet，bitter，and pungent tastes，and tropism to the lung，stomach，and liver meridians.Five commonly used Chinese medicine combinations were obtained by the association rule analysis，and three core prescriptions were revealed by the cluster analysis.Conclusion:Professor WANG Shouchuan held that the tonsillitis in pediatric mainly involved the lung，stomach，and liver，with the basic pathogenesis of insecurity of lung defense and heat accumulation in the throat.Staged treatment can be carried out regarding the acute attack，intermittment，and chronic persistent stages.The commonly used prescriptions were Yinqiao Powder，Wuwei Xiaodu Decoction，Yupingfeng Powder，Guizhi Longgu Muli Decoction，and Xiebai Powder，and the doses of the commonly used Chinese medicines were relatively small.