Chinese herbal preparation for treating ankylosing spondylitis

The invention relates to a Chinese herbal preparation for treating ankylosing spondylitis, which comprises the following Chinese medicinal herbs by weight: 10g of rhizoma cibotii, 15g of pilose antler, 10g of himalayan teasel root, 5g of scorpio, 15g of kudzu vine root, 12g of chuanxiong rhizome, 5g of caulis spatholobi, 15g of white paeony root, 15g of common peony root, 10g of safflower carthamus, 15g of medicinal cyathula root and 10g of white mustard seed. The Chinese herbal preparation is prepared by using the steps of: weighing the Chinese medicinal herbs in the formula, adding 1500ml of water, decocting with slow fire to ensure that medicine liquid is concentrated to 250ml, filtering dregs of a decoction and preparing a decoction. During the treatment, the decoction is taken orally, each dosage is taken every day, and one treatment course includes 90 days. The Chinese herbal preparation is used for treating the ankylosing spondylitis through improving immunity and micro circulation and eliminating bloo