The invention discloses an external plaster for pediatric deficiency cold and preparation method thereof. Aim at the physiological and pathological characteristics of children and the pathogenic factors and pathogenesis of pediatric deficiency cold, 8 Chinese crude drugs ccontaining white atractylodes rhizome, clove, chinese magnoliaving, nutmeg and so on, is processed by decocting, condensing, crushing, concocting and the other steps to form plaster. The inventive plaster has functions of invigorating qi and yang, supplementing huo and eliminating han. The principle indications are pediatric deficiency cold, sickness, hiccup, diarrhea, cllic, cough, night cry, enuresis, pale complexion, coldness of the body and limbs, tiredness, inappetence, pale lips, whitish tongue and thin white tongue, etc. The external plaster is safe and convenient in use, with remarkable effect. It solves the probleme of fearing the needle and repelling the drugs of the children, furthermore convenient for controling quality and favourable to large-scale industrialization and continuous production.