The present invention relates to one kind of externally applied plaster for treating osteoarthrosis caused by wind, cold and damp. The plaster is prepared with clematis root, spatholubus stem, yam rhizome, large-leaf gentian root, ledebouriella root and other Chinese medicinal materials, and through alcohol extraction to obtain extracted solution, adding matrix and other steps. It has the functions of relaxing muscles and tendons, promoting blood circulation, dispersing blood clots, dispelling cold, eliminating wind and damp, etc. It is used in treating arthritis, protrusion of cervical intervertebral disc, protrusion of lumbar intervertebral disc, spur, sciatica, etc. and has high curative effect.