The invention relates to a big compound Chinese medicinal preparation and a quality detection method thereof. A medicinal composition for treating the skin injury, which is disclosed by the invention, is external liniment prepared from the following 94 raw material medicaments in part by weight: 25 parts of rhizoma coptidis, 25 parts of red paeony roots, 75 parts of rhubarb, 75 parts of divaricate saposhnikovia roots, 44 parts of angelica dahurica, 13 parts of heracleum hemsleyanum diels, 13 parts of incised notopterygium rhizome, 19 parts of rhizoma arisaematis, 25 parts of ligusticum chuanxiong, 25 parts of common bletilla pseudobulb, 50 parts of common burreed rhizome, 75 parts of clematis roots, 50 parts of zedoary, 75 parts of combined spicebush roots, 100 parts of frankincense, 13 parts of cyperus rotundus, 25 parts of rhizoma drynariae, 75 parts of Indian iphigenia bulb, 25 parts of peach seed, 100 parts of common cnidium fruit, 25 parts of siberian cocklour fruit, 50 parts of castor bean, 75 parts of water banyan, 25 parts of tangerine peel, 25 parts of green tangerine peel, 25 parts of pummelo peel, 50 parts of gardenia, 13 parts of fructus amomi, 75 parts of hiraute shiny bugleweed herb, 50 parts of tamariskoid spikemoss herb, 50 parts of yerbadetajo herb and the like. By repeated compositional experiments, the compound Chinese medicinal preparation accords with the traditional Chinese medicine composition and compatibility principle; in the compound preparation, the medicaments are complemented with each other and can comprehensively take the effects; and the medicinal composition has an obvious treatment effect in scalding by water and fire, traumatic injuries, bleeding knife wounds and the like and has no obvious toxic or side effects.