To analyze the rule of Chinese Medicine patent compound in the treatment of diarrhea-type irritable bowel syndrome(IBS-D)by applying association rules,and cluster analysis.Methods:The patent compound for the treatment of IBS-D was retrieved according to the inclusion and exclusion criteria.Excel was established to normalize the terms of the selected compounds,and data mining software was used to conduct frequency statistics,frequent item set analysis,association rule analysis,cluster analysis and complex network analysis.Results:A total of 96 patent compounds were obtained.The frequency statistics showed that drugs were warm and mild,and they were mainly sweet,spicy and bitter.Chinese Medicinal used frequently included Radix Paeoniae Alba,Pericarpium Citri Reticulatae,Rhizoma Atractylodis Macrocephalae,Radix Saposhnikoviae,Poria,Radix Glycyrrhizae,Radix Aucklandiae,Rhizoma Coptidis Huanglian,bran fried Rhizoma Atractylodis Macrocephalae and Radix Bupleuri.Frequent item set analysis showed that compatibility of drugs was mainly to harmonize liver and spleen,and eliminate dampnes to prevent diarrhea.Analysis of association rules showed that the common drug pairs included Radix Saposhnikoviae-Radix Paeoniae Alba,Radix Bupleuri-Radix Paeoniae Alba,roasted Radix Glycyrrhizae-Pericarpium Citri Reticulatae,Rhizoma Dioscoreae-Poria.Cluster analysis revealed 3 functional modules,namely,tonifying spleen and softening liver,clearing damp and preventing diarrhea; regulating qi to relieve pain,eliminating dampness to prevent diarrhea; warming the middle and dissipating cold,astringing the bowel diarrhea.It was founded that in the complex network analysis that there were 33 core drugs,and the core compatibility was tonifying spleen and softing liver,clearing damp and astringing diarrhea.Conclusion:Data mining provides a reference for the clinical treatment of IBS-D.It should be treated according to the syndrome differentiation based on the basic methods of regulating liver,strengthening spleen and warming kidney,as well as astringing the bowel diarrhea,nourishing the heart and calming the mind,and regulating cold and heat.