The invention belongs to the technical field of medicines and particularly relates to a medicine for treating sub-acute eczema. The medicine is prepared from, by weight, 4-6 parts of Chinese fanpalm seeds, 4-6 parts of a fewflower lysionotus herb, 4-6 parts of roots of candolle pimpinella, 4-6 parts of roots of champion pentasacme, 4-6 parts of tubers of serrate sikoku jackinthepulpit, 4-6 parts of nude pronephrium rhizomes, 4-6 parts of all-grass of winkled marshweed, 4-6 parts of perny germander roots, 4-6 parts of a pilose bushclover herb and 4-6 parts of lance coreopsis leaves. The medicinal materials are used in a combined mode and jointly have the effects of clearing away heat and toxic materials, invigorating blood circulation, eliminating swelling, regulating qi-flowing, removing stasis, dispersing blood stasis and relieving pain, and the medicine is used for treating the sub-acute eczema and has the advantages of being high in cure rate and obvious effective rate.