The invention discloses a traditional Chinese medicine granule for treating infantile diarrhea and the preparation method of the traditional Chinese medicine particle. The traditional Chinese medicine granule is prepared by the following processes: carrying out water decoction, filtering, concentrating, drying, pelletizing, packing and the like by taking 25 medical materials as raw materials, such as clove, poria cocos, schisandra chinensis, flour-cooked kudzuvine root, fructus evodiae, salt plantain seed, scutellaria baicalensis, rhizoma alismatis, pericarpium arecae, fried Chinese date, fried hawthorn, salvia miltiorrhiza, coptis root, simmered costustoot, dark plum, houttuynia cordata, pericarpium citri reticulatae viride, astragalus mongholicus, baked ginger, bran-fried endothelium corneum gigeriae galli, bran-fried Chinese yam, cinnamon, carbonized sanguisorba root, roasted rhizoma atractylodis macrocephalae and flour-cooked medicine terminalia fruit. The traditional Chinese medicine granule has the effects of tonifying spleen and stopping diarrhea, helping digestion and eliminating indigestion, clearing heat and drying damp, is suitable for various infantile diarrheas including acute diarrhea, chronic diarrhea, infectious diarrhea and non-infectious diarrhea; and the traditional Chinese medicine granule has the characteristics of unique formula, prominent curative effect, less medicine use, quick effect, short treatment course, quick recovery, no toxic and side effects and the like, and is convenient to carry and take. After the traditional Chinese medicine granule for treating the infantile diarrhea is adopted to treat 263 patients, the total effective rate reaches more than 98%.