The invention relates to the field of traditional Chinese medicines, and discloses an external traditional Chinese medicinal composition for treating myofascitis. The traditional Chinese medicinal composition is prepared from the following traditional Chinese medicinal raw materials in parts by weight: 10-30 parts of radix clematidis, 5-15 parts of lycopodium clavatum, 5-15 parts of kadsura root-bark, 5-15 parts of cortex erythrinae variegatae, 5-15 parts of Ligusticum wallichii, 3-10 parts of pseudo-ginseng, 3-10 parts of cortex dictamni, 3-10 parts of resurrection lily rhizome and 2-5 parts of turpentine. The invention also provides a preparation method of the traditional Chinese medicinal composition, which comprises the following steps: decocting and extracting the traditional Chinese medicinal raw materials: radix clematidis, lycopodium clavatum, kadsura root-bark, cortex erythrinae variegatae, Ligusticum wallichii, pseudo-ginseng, cortex dictamni and resurrection lily rhizome, adding the turpentine, and uniformly mixing to obtain the active component of the traditional Chinese medicinal composition. On the basis of basic pathogenesis of myofascitis, which is mainly reflected on cold-damp stagnation in ribs, as well as qi-stagnation and blood stasis, the traditional Chinese medicinal composition can be used for effectively treating myofascitis by adopting a basic method of dispelling coldness and eliminating dampness, activating blood circulation to remove stasis, soothing tendons and dredging collaterals.