The invention discloses a Chinese herbal feed modifier for improving meat quality of livestock and poultry and quality of fresh eggs. The Chinese herbal feed modifier is prepared from bamboo fungus, cordyceps militaris, tuckahoe, flammulina velutipes, pelvetia silquosa, Chinese yam and codonopsis pilosula. The feed modifier contains nutritional ingredients such as protein, a plurality of vitamins and microelements, and a bioactivator, has the functions of adjusting the physiology of livestock and poultry bodies, and resisting bacteria and viruses, and not only is beneficial to growth and breeding of the livestock and poultry, but also can be used for improving the quality of livestock and poultry products greatly, enhancing the immunity of the livestock and poultry effectively and improving the disease resistance and the ability of preventing various diseases. The feed modifier disclosed by the invention is safe and innoxious, free of drug resistance, free of residue and free of toxic and side effects. By virtue of the feed modifier, harmful substances in an animal body can be discharged, the meat quality of the livestock and poultry products and the quality of the fresh eggs are improved, the fiber compactness of muscle is enhanced, the fiber tissue and grain of stiff muscle are softened and degraded, and peculiar smell, such as fishy smell, greasy smell, urine odor and smell of mutton, in the meat are removed, so that the meat is fresh, tender, smooth, tough, chewy, palatable, natural and fragrant. The fresh eggs are natural and bright in color, and have natural fragrance.