Although the ability of the rabbit to digest crude fiber is poor, crude fiber is of great importance to its digestion process. On the one hand to provide energy, crude fiber feed in the large intestine by microbial fermentation of volatile fatty acids, absorbed in the large intestine, in the body oxidation capacity or used as raw materials for the synthesis of rabbit body material. On the other hand, normal digestive function is maintained, and undigested feed fibers play a role in promoting renewal of large intestine mucosal epithelium, accelerating peristalsis, and preventing intestinal diseases. In addition, dietary crude fiber is necessary to maintain the normal consistency of the chyme and control its passage through the digestive tract and the formation of hard feces. However, if the crude fiber content is too high, not only the burden on the digestive tract will be aggravated, but also the content of other nutrients in the diet will be impaired, which will affect the digestion, absorption and utilization of protein, fat, crude fiber and other nutrients in the intestinal tract. According to experiments, the crude fiber content in the rabbit diet was 12%. Young rabbits may be lower, but not less than 3%. Adult rabbits may be higher, but not higher than 20%. The week-old growth rabbits were fed a diet containing 9% crude fiber for best performance. China Agricultural Network Editor