The invention relates to plaster for treating 
herniated disk, hyperosteogeny and rheumatoid diseases and a preparation method thereof. The plaster is prepared from three groups of medicinal compositions A, B and C. The medicinal composition A consists of the flowing 
raw material medicaments in part by weight: 50 to 100 parts of tuberculate 
speranskia herb, 50 to 100 parts of common monkshood mother root, 50 to 100 parts of kusnezoff 
monkshood root, 30 to 70 parts of star anise, 30 to 70 parts of fennel fruit, 50 to 70 parts of falangal, 50 to 70 parts of cinnamon, 30 to 50 parts of 
pangolin scales, 30 to 70 parts of 
bark of Japanese stauntonvine, 20 to 30 parts of 
white mustard seed, 20 to 30 parts of spiderflower seed, 10 to 30 parts of 
dactylicapnos root, 30 to 50 parts of nux vomica, 30 to 50 parts of wooly datchmanspipe 
herb, 30 to 50 parts of 
schizophragma integrifolium oliv, 10 to 30 parts of Chinese starjasmine stem, 10 to 30 parts of ovientvine, 10 to 30 parts of 
kadsura pepper stem and 10 to 30 parts of 
tinospora sinensis merr; the medicinal 
composition B consists of the following 
raw material medicaments in part by weight: 10 to 30 parts of frank incense and 10 to 30 parts of 
myrrh; and the medicinal 
composition C consists of the following 
raw material medicaments in part by weight: 0.5 to 1 part of musk, 10 to 20 parts of gamboge, 10 to 20 parts of dragon's blood, 5 to 10 parts of 
camphor and 5 to 10 parts of 
borneol. The preparation method comprises the following steps of: adding water in an amount which is 3 to 5 times the weight of the medicinal composition A into the medicinal composition A, decocting 1 hours over 
slow fire and removing dregs of a decoction; then adding the medicinal 
composition B and after the medicinal composition is dissolved, and adding minium to prepare paste; and adding the medicinal 
composition C, uniformly stirring, removing fire-
toxin and spreading on cyan cloth to obtain the plaster.