The invention discloses an external traditional Chinese medicine plaster for treating osteoproliferation and a preparation method thereof, and belongs to the field of traditional Chinese medicines. The effective constituents of the external traditional Chinese medicine plaster comprise the following raw materials: radix angelicae, fructus psoraleae, common achyranthes herb, radix achyranthis bidentatae, piper wallichii, stephania sinica diels, debregeasia edulis, glossy privet fruits, pink reineckea herb, cinnamomum tamala, honeysuckle, piper sarmentosum, gentiana macrophylla, rhizoma fagopyri cymosi, notopterygium root and nervilia fordii. The external traditional Chinese medicine plaster selects a good traditional Chinese medicinal material formula, has remarkable efficacies on treating malnutritional osteoproliferation, aplastic osteoproliferation and the like, and is simple in preparation process, low in cost, convenient to use, short in treatment course, fast in effect, free from any toxic or side effects and obvious in blood enriching effect; the total effective rate reaches 97.4%.