The invention discloses an extcrnal antipruritic Chinese drug for curing the itch dermatoses, which is composed of 5 to 15 parts of shrubalthea bark, 15 to 30 parts of cnidium fruit, 5 to 10 parts of corktree bark, 5 to 10 parts of flavescent sophora root, 5 to 15 parts of root of paniculate swallowwort, 5 to 10 parts of dahurian angelica, 5 to 15 parts of Japanese ampelopsis, 5 to 10 parts of hyacinth bletilla, 15 to 30 parts of herb of Christina loosestrife, 10 to 15 parts of hairy vein agrimony, 10 to 15 parts of stemona Japonica Miq, 5 to 15 parts of capsule of weeping forsythia, 5 to 10 parts of common fenel, 15 to 30 parts of adsuki bean, 10 to 15 parts of knotweed and 10 to 15 parts of root-bark of densefruit ditany. The extcrnal Chinese drug for curing the itch dermatoses has the advantages of alleviating itch quickly, taking effect and curing fast, no scar at the skin damage position, convenient operation, no distress and toxic and side effects, etc. The patient can relieve itching in few seconds with the drug of the invention according to the clinical work, and can be cured without pains. The dermatoses of the acute disease can be cured in 1 to 3 days, and the chronic debilitated and recurrent disease can be cured in 1 to 3 monthes with matching with the Chinese drug for curing the itch dermatoses (internal and external application). The effective rate is 100 percent, the curative ratio is 100 percent, and the disease is not easy to be recurred after curing.