The invention discloses application of grass-cultivated 
ganoderma lucidum dreg in 
dairy cattle feeding, and belongs to a recycling method of waste in the 
edible fungus industry. The feed comprises the following components in percentage by weight: 4 percent of 
ganoderma lucidum dreg, and 96 percent of dairy cow ration. Aired and crushed 
ganoderma lucidum dreg and the dairy cow ration are uniformly mixed to feed dairy cows, and the feeding management is carried out according to a conventional method. The feed has the advantages of rich 
nutrition, simple process, low price and the like, has bioactivity and functions similar to 
ganoderma lucidum mycelia polysaccharides because most crude 
polysaccharide is grass-cultivated 
ganoderma lucidum mycelia polysaccharides, and can be used for feeding dairy cow to replace partial 
antibiotics, so that the health of dairy cow is facilitated; and the grass-cultivated 
ganoderma lucidum dreg is used to replace the feed which has similar 
nutrition content and higher price, such as 
beet pulp, 
bran and the like, the feed cost can be reduced, and the economical benefit can be increased. According to the grass-cultivated ganoderma lucidum dreg feed for dairy cow feeding, the main 
immunity component IgG (
immunoglobulin G) content of milk can be increased, and the milk quality can be promoted.