The human digestive tract contains a large number of digestive enzymes, in the stomach gastric juice can secrete pepsin can digest part of the protein, food into the small intestine after the pancreas will secrete a variety of proteases and lipases to digest food, the main component of bones is calcium and phosphate deposits, small pieces of bones can be digested, in passing through the small intestine there are enough enzymes can cover the surface of the bone to make it dissolved and absorbed. If large pieces of bones are swallowed, they cannot be completely digested because digestive enzymes cannot completely wrap them. If after digestion in the small intestine, the bones are still present not easily through the ileocecal region, it will easily lead to small intestine obstruction, which will result in abdominal pain, abdominal distension, and the cessation of defecation and exhaustion.