The invention provides a Chinese herbal medicinal composition for preventing and controlling diarrhea of piglets. The Chinese herbal medicinal composition comprises the following components by weight: of 20-30g of Chinese pulsatilla root, 15-25g of coptis root, 10-20g of pellodendron, 15-25g of the bark of ash, 20-30g of herba portulacae, 10-20g of pomegranate peel, 10-20g of chestnut pericarp, 10-20g of plantago asiatica, 5-15g of red halloysite, 15-25g of rhizome of large-headed atractylodes, 15-25g of milkvetch root, 15-25g of yam, 15-25g of tuckahoe, 15-25g of agastache rugosa, 10-20g of radix scutellariae, 15-25g of rhizoma atractylodis, 15-25g of cortex magnoliae officinalis, 10-20g of medicine terminalia fruit, 15-25g of hawthorn, 20-30g of pueraria root, 15-25g of radix bupleuri, 20-30g of medicated leaven, 10-20g of semen raphani, 5-15g of membrane of chicken gizzard, 10-20g of talc, 10-20g of oriental waterplantain rhizome, 10-20g of medicinal evodia fruit and 5-15g of fructus psoraleae. The composition disclosed by the invention is a treatment formula for overcoming the defects of high morbidity, high death rate, intractability and no special effect; the fundamental difficult problem about the prevention and the control for the diarrhea of the piglets is solved.