The invention which relates to a preparation method of a Yunkang capsule belongs to the technical field of medicines. The Yunkang capsule of the invention is prepared from the following raw traditional Chinese medicines: 80-120 parts of donkey-hide gelatin, 160-200 parts of Chinese yam, 90-130 parts of Himalayan Teasel Root, 120-160 parts of Radix Astragali, 90-130 parts of Chinese angelica, 120-160 parts of Rhizoma Cibotii, 90-130 parts of Cuscuta chinensis Lam., 50-90 parts of Chinese Taxillus Twig, 90-130 parts of Eucommia ulmoides, 90-130 parts of Malaytea Scurfpea Fruit, 90-130 parts of Radix Codonopsis, 120-160 parts of Poria cocos, 90-130 parts of Rhizoma Atractylodis Macrocephalae, 120-160 parts of rehmannia, 90-110 parts of Cornus officinalis, 120-160 parts of wolfberry fruit, 50-90 parts of Dark Plum Fruit, 90-130 parts of white peony root, 50-90 parts of Fructus Amomi, 50-90 parts of Fructus Alpiniae Oxyphyllae, 90-130 parts of Radix Boehmeriae, 5-20 parts of Argy Wormwood Leaf and 50-90 parts of Radix Scutellariae.