The invention discloses a medicament for treating thromboangitis obliterans, which is formed by mixing, crushing and grinding the following components in weight parts: astragalus mongholicus, honeysuckle, Chinese angelica, leech, centipede, bombys batryticatus, earthworm, roasted liquorice, roasted frankincense, myrrh, ground beetle, scorpion, radix salviae miltiorrhizae, hemlock parsley, roasted nux vomica and cassia twig. The medicament has the functions of reinforcing qi and nourishing blood, removing cold-dampness, activating blood circulation to remove stasis, regulating meridians, supporting healthy energy, and removing blood stasis to promote tissue regeneration, and is used for treating vital energy and blood circulation obstruction caused by weak, cold and damp spleen and kidney, venation stasis, and vasculitis at tail ends of four limbs or caused by fire heat generation and yin impairment due to damp stagnation. The medicament has remarkable effect to each phase of the vasculitis, has good treatment effect to deep venous thrombosis, phlebophlogosis and other peripheral vascular diseases, and has high cure rate, quick response, stable curative effect and relapse prevention.