The beneficial bacteria or fungi in human and animals mainly include Clostridium butyricum, lactic acid bacteria, Bifidobacterium, Lactobacillus acidophilus, actinomycetes, yeast and so on. At present, the most studied products in the world are mainly compound active probiotics composed of the above microorganisms, which are widely used in bioengineering, industry and agriculture, food safety and life and health. Probiotics can produce vitamins including pantothenic acid, nicotinic acid, B 1, B2, B6 and vitamin K, as well as short-chain fatty acids, antioxidants and amino acids, which play an important role in bone growth and heart health.