The invention relates to a formula for a plaster for treating innominate gall of red and swollen tall sores and a preparation method, and belongs to the field of formulas of traditional Chinese medicines. In the formula, the plaster comprises the following components in part by weight: 500 parts of colophony, 50 to 60 parts of frankincense, 50 to 60 parts of myrrh, 250 parts of camphor, 5 to 10 parts of gamboge, 100 parts of gypsum, 8 to 10 parts of dragon's blood, 8 to 10 parts of borneol, 30 to 50 parts of mature wheat flour and 1 part of bright pink edible pigment. The cost of the main ingredients of the Chinese medicinal preparation is low, the mixing of the medicines is reasonable, and the Chinese medicinal preparation has the effects of promoting blood circulation, removing blood stasis, diminishing inflammation, easing pain, dispelling pathogenic fire, relieving internal heat, promoting tissue regeneration, converging wounds and the like, has the peculiar treatment effect on symptoms such as red and swollen tall sores, swelling mumps, intramammary abscess, stasis aphtha, innominate gall, blood stasis due to wounds which are not healed for a long time and the like, and has a certain curative effect on scapulohumeral periarthritis and arthritis.