The invention discloses a feed additive for improving fur quality of fur-bearing animals and an application method thereof. The product is composed of the following raw materials in parts by weight: 18-28 parts of purslane, 10-20 parts of spreading hedyotis herb, 12-18 parts of poria cocos, 6-15 parts of towel gourd vegetable sponge, 7-15 parts of leafy twigs of Chinese arborvitae, 12-25 parts ofglossy privet fruits, 5-15 parts of raw ginger, 4-10 parts of white mulberry root-bark, 3-9 parts of astragalus roots, 6-13 parts of dahurica angelica roots, 4-9 parts of fleeceflower roots, 10-20 parts of stevia, 6-10 parts of liquorice, 15 parts of a composite enzyme preparation, 2 parts of amino acid chelated trace elements, 30 parts of a micro-ecological preparation, 1 part of astaxanthin, and2 parts of vitamin C. The product has the efficacy of Chinese herbal medicines, the micro-ecological preparation and the enzyme preparation, and synergistic interaction of the materials can significantly improve the fur quality of the fur-bearing animals, is beneficial to solving the industrial bottleneck that at present, the fur quality of the fur-bearing animals is not high, and simultaneouslycan promote the growth of the fur-bearing animals, enhance the immunity of organisms, and significantly improve the economic benefits of fur-bearing animal breeding.