Objective:To explore the clinical drug use of Professor Liu Shangyi,a master of Chinese medicine,in the treatment of thyroid cancer based on the ancient and modern medical record cloud platform v1.5.7 software.Methods:From January 01,2018 to April 01,2019,the information input system of Professor Liu Shangyi,traditional Chinese Medicine Hospital of Guizhou Province,was screened.The data mining and analysis module was used to explore the clinical drug use of Professor Liu Shangyi in the treatment of thyroid cancer.Results:A total of 207 medical cases were recorded in this study,with 207 prescriptions,involving 129 kinds of herbs.The five most frequently used herbs are Ezhu(Curcumae Rhizoma),Biejia(Trionycis Carapax),Maozhuacao(Ranunculi Ternati Radix),Donglingcao(Rabdosia rubescens)and Chaojiezi(Sinapis Semen).Most of the drugs are warm and cold;most of the five flavors are sweet and bitter;most of the Meridian tropism are lung and liver;and the main efficacy are clearing away heat and toxic materials,eliminating phlegm and resolving hard mass.The most frequent correlation analysis of traditional Chinese medicines(TCM)are Bie Jia(Trionycis Carapax)-Ezhu(Curcumae Rhizoma),Donglingcao(Rabdosia rubescens)-Ezhu(Curcumae Rhizoma).Conclusion:Professor Liu Shangyi often use clearing away heat and toxic materials,resolving phlegm and disperse knot combined with tonifying liver and kidney in order to help fostering vital Qi and dispeling evil in clinical treatment of thyroid cancer.