The prevention and treatment of night grinding teeth should start from the etiology, in order to receive good results. (1) eliminate tension to lift unnecessary worries, open-minded, reasonable arrangements for work. (2) to develop a good lifestyle habits regular living, dinner should not be too full, no strenuous exercise before bed, especially children do not watch stimulating films before bed. (3) If intestinal parasites are suspected, deworming treatment should be carried out under the guidance of physicians to reduce intestinal parasites’ peristaltic stimulation of the intestinal wall. (4) Correct bad habits of the dental and jaw system such as unilateral chewing and pencil biting.