The invention discloses a traditional Chinese medicinal composition for treating skin diseases. The traditional Chinese medicinal composition is characterized by consisting of a component A and a component B, wherein the component A is any one or any mixtures of radix paeoniae rubra, rhizoma chuanxiong, radix angelicae lateralis preparata, radix rehmanniae and flos carthami and the component B is any one or any mixtures of radix astragali, ginseng, honeysuckle flowers, radix scutellariae, cortex phellodendri, fructus forsythiae, sliced white aconite, cortex cinnamomi and radix rubiae. The traditional Chinese medicinal composition for treating the skin diseases provided by the invention is used for implementing treatment on the basis of the principle of treating blood before pathogenic wind and removing pathogenic wind by promoting circulation of blood in accordance with the theory of traditional Chinese medicine, 'eight-syndrome' differentiation of traditional Chinese medicine: yin, yang, exterior, interior, cold, heat, deficiency and excess, eight methods in traditional Chinese medicine treatment: warming, clearing, removing, reinforcing, perspiration, vomiting, purgation and alleviating, as well as the basic theory of meridian tropism of medicines. For different diseases in patients, different components of the traditional Chinese medicinal composition are adopted according to indications, so that a therapeutic effect is enhanced. In addition, on the basis of synergism and antagonism among the various medicines, a better curative effect can be achieved through actions among the medicines.