The invention discloses a Yao medicine plaster for external use with the effects of strengthening tendons and bones and a preparation method thereof. The Yao medicine plaster for external use is prepared from the raw materials comprising the following components: ormosia henryi prain, buffalo milk, Semiliquidambar cathayensis, radix cinnamomi camphori, polygonum perfoliatum, radix zanthoxyli, floscarthami, radix angelicae sinensis, fiber, cortex cinnamomi, phyllodium pulchellum, dried rattan of Mappianthus iodoides and lotus leaves. The raw materials are proportioned in proportion, and are smashed and disinfected; the effective medicine ingredients in the raw materials are extracted with a modern medicine method, and the plaster for external use is prepared; moreover, the Yao medicine plaster for external use has the effects of supplementing qi and blood, dispelling wind, eliminating dampness, invigorating blood circulation and eliminating stagnant blood. The Yao medicine plaster forexternal use can treat the diseases such as bone fracture lumbago, pain and swelling from injuries, rheumatic arthralgia, deficiency of vital energy, kidney deficiency, aching and limp tendons and bones, rheumatic ostalgia, arthritis, traumatic injuries and bone fractures.