The prevention and treatment methods of grinding teeth at night in bed are as follows: First, before going to bed, we should carefully brush our teeth and rinse our mouth to remove the food debris on the surface of the teeth and on the tongue, in order to alleviate and prevent the occurrence of nocturnal grinding of teeth; second, we should treat the dental diseases in the mouth, if there is caries in the mouth, we should carry out the treatment of dental caries. If there is pulpitis and apical periodontitis, root canal treatment should be done, and patients with periodontitis should have systematic periodontal treatment, which can alleviate the symptoms of pain and discomfort in the mouth through treatment, so as to alleviate the phenomenon of nocturnal teeth grinding; thirdly, occlusal pads can be made and worn to be able to make the upper and lower teeth separate, and alleviate the excessive grinding of teeth due to nocturnal teeth grinding; fourthly, if the teeth are unevenly worn due to the Fourth, if the teeth are in contact with individual cusps due to uneven wear, the cusps in early contact should be adjusted and ground, so that the teeth can achieve even and stable occlusal contact, thus preventing and treating nocturnal teeth grinding.