The invention belongs to the technical field of breeding, and discloses a feed additive used for removing mutton odour of mutton. The feed additive is prepared from frozen bean curd, celery, pawpaw, natto, hawthorn fruit, salted duck egg, durian peel, orange peel, white tea, grape seed, liquorice, hot pepper, black pepper, cumin, radix aucklandiae, and lactobacillus delbrueckii. The raw materials of the feed additive are easily available; cost is low; nutrient balance is achieved, mutton odour removing ratio is 93.7%; frozen bean curd and celery are capable of degrading fat, and reducing fat absorption; enzyme is generated via fermentation of pawpaw, natto, and hawthorn fruit, and is capable of reducing fat accumulation; salted duck egg is abundant in nutrients, and is capable of reducing absorption of intestinal tract on mutton odour fatty acid; the spices and the traditional chinese medicinal materials are rich in fragrance, are capable of improving palatability and health care functions of feeds, and reducing the content of mutton odour fatty acid in mutton; feeding at night is capable of promoting absorption of sheep on the feed additive, and improving mutton odour removing effect; and mutton obtained via application of the feed additive is welcomed by more people, and economic income is increased by 23.3%.