The invention discloses a traditional Chinese medicine paste patch applied to irregular menstruation of gynecology and a preparation method. The traditional Chinese medicine paste patch is prepared from, by weight, 25-35 parts of fennel, 100-300 parts of leonurus, 40-80 parts of codonopsis pilosula, 40-60 parts of radix paeoniae alba, 40-60 parts of safflower carthamus, 40-60 parts of poria with hostwood, 40-60 parts of teasel roots, 25-35 parts of rhizoma corydalis, 15-25 parts of folium artemisiae argyi, 15-25 parts of herba lycopi, 25-35 parts of eucommia ulmoides, 15-25 parts of rhizoma atractylodis macrocephalae, 15-25 parts of akebiaquinata, 15-25 parts of elecampane and 15-25 parts of Chinese cinnamon. The traditional Chinese medicine paste patch prepared through the preparation method and the preparation method have the advantages that the paste patch effectively treats symptoms of cold in uterus, irregular menstruation, lochia, abdominal pain and the like; the curative effect is definite, homology of medicine and food is achieved, external use is convenient, no side effect exists, the preparation method is simple, ingredients are stable, and the traditional Chinese medicine paste patch has great social benefits and economic benefits.