Chewing and swallowing is good for the digestion of food. Chewing and swallowing can promote the body’s absorption of food and reduce the burden on the stomach and intestines. Teeth play a physical crushing effect on food, through sufficient chewing can be chewed food more broken, increase the contact area of food and liquid in the mouth and promote better digestion of food, thereby reducing the burden on the stomach and intestines. Salivary amylase contained in saliva is mainly to play a chemical digestive role, can be broken down into maltose starch in the food, which is why the food in the chewing process will be more chewing the sweeter. Eating slowly can effectively prevent high blood pressure, high blood sugar and other symptoms, because chewing slowly can make blood sugar rise slower, can prevent because eat too fast to make the food hurt to the trachea or stimulate the intestines and gastrointestinal diseases caused by intestinal. Therefore, in daily diet, we should pay attention to chewing and swallowing slowly to improve the digestion of food in the stomach.