The invention discloses a Chinese medicinal plaster, in particular an externally applied medicament for a pediatric umbilical part and a preparation method thereof. The externally applied medicament for the pediatric umbilical part is characterized by being prepared from the following components: common burreed rhizome, curcuma zedoary, pangolin scales, medicine terminalia fruit, pepper, hawthorn, pharbitis seed, clove, Indian buead, medicinal evodia fruit, cinnamon, atractylodes rhizome, areca seed, oriental waterplantain rhizome, plantain seed, dried ginger, cuttlebone, radish seed, malt, amomum fruit, borneolum, musk and honey. The Chinese medicinal plaster is specially used for treating pediatric indigestion, diarrhea, anorexia, dyspepsia and malnutrition; the various medicaments are combined to activate qi, blood circulation and coronary circulation so as to fulfill the aim of tonification and purgation in combination; the plaster is safe in clinic application; medicament concentration in tissues of the umbilical part is obviously higher than blood concentration in the tissues of the umbilical part; therefore, the plaster is brought into full effect, the local curative effect is obviously superior to that of internal treatment, and the plaster has quick response, broad indication, is safe in use and has less toxic or side effect. 150 cases are treated in all, and the total effective rate reaches 96 percent.