The invention provides a traditional Chinese medicinal composition for treating escherichia coli diarrhea of piglets. The traditional Chinese medicinal composition comprises liquorice, herba houttuyniae, sophora flavescens, acanthopanax, puerarin, semen coicis, coriolus versicolor, jasmines, endothelium corneum gigeriae galli, cortex phellodendri, dandelion, selaginella tamariscina, polygonatum kingianum, eclipta, companumoea root, bauhinia championii, astragalus complanatus, fructus psoraleae, rosa laevigata michx, pericarpium granati, honeysuckle, pipewort, sedum verticallatum, leonurus and morinda officinalis. The traditional Chinese medicinal composition additive is low in cost and does not have residue and drug resistance; compared with the antibiotic and other chemical synthesized medicines, the traditional Chinese medicinal composition contains multiple effective components and can achieve a comprehensive prevention and treatment effect; meanwhile, the whole function of an animal organism can be improved; the traditional Chinese medicinal composition realizes a giant function in modern breeding production.