The invention discloses a piglet anti-diarrhea compound Chinese herbal medicine feed and a preparing method thereof. The piglet anti-diarrhea compound Chinese herbal medicine feed is prepared from corn flour, wheat bran, soybean meal, flour, longan husks, pine needles, folium cortex eucommiae, an additive, licorice roots, herba centellae, rhizoma curcumae longae, semen cassiae, portulacae herba, hawthorn leaves, dried tangerine or orange peel, polyporus umbellatus, clover blossoms, fructus mume, cutch, Echinacea extract, calcium powder, calcium hydrophosphate and vitamin complexes. The additive is prepared from sophora japonica leaves, fructus arctii, rhizoma polygonatum, cortex pseudolaricis and albizia flower by weight. By adding medicinal herb preparations, the compatibility is scientific, nutrition is comprehensive, intestinal flora are effectively regulated, growth of pathogenic microorganisms is effectively inhibited, normal intestinal microflora can be easily maintained, the immunity of piglets is enhanced, the quality and stability of the feed are improved, the digestion, absorption and utilization rate of nutrition is increased, the healthy growth of piglets is promoted, and the phenomena such as diarrhea and growth cessation can be effectively controlled.