The invention provides an oral capsule used to cure the pains in neck, waist and legs, as well as the preparation method thereof. The oral capsule is composed of 36 species of traditional Chinese medicines by the weight ratios and the formula as follows (takes preparing 1000 oral capsules as the standard): heracleum hemsleyanum michaux 9 to 90 gram, gentian root 9 to 90 gram, ledebouriella seseloides 9 to 90 gram, asarum herb 3 to 30 gram, viscum album 12 to 120 gram, angelica 9 to 90 gram, white peony root 9 to 90 gram, ligusticus wallichii franchet 8 to 80 gram, arable land 9 to 90 gram, cortex eucommiae 10 to 100 gram, butter 10 to 100 gram, butcher shop 9 to 90 gram, Japanese teasel 12 to 120 gram, cassia bark 5 to 50 gram, codonopsis pilosula 12 to 120 gram, astragalus root 12 to 120 gram, rhizoma gastrodiae 6 to 60 gram, Chinese wolfberry 12 to 120, kudzu root 10 to 100 gram, akebiaquinata 10 to 100 gram, atractylis ovata 10 to 100 gram, clematis chinensis 10 to 100 gram, safflower 6 to 60 gram, cortex moutan 6 to 60 gram, mastic 6 to 60 gram, common myrrh 6 to 60 gram, Chinese flowering quince 10 to 100 gram, drynaria 12 to 120 gram, caulis spatholobi 12 to 120 gram, panax notoginseng 10 to 100 gram, crow 10 to 100 gram, dried body of scorpion 9 to 90 gram, centipedes 2 to 15, dragon blood 10 to 100 gram, eupolyphaga 12 to 120 gram and broiled licorice root 0 to 30 gram; the quality of all traditional Chinese medicines satisfies the standard of the Chinese Pharmacopoeia, and the traditional Chinese medicines are made into powder according to the Chinese traditional medicine preparation method, and are then canned into capsules.