Oral disease, as a common affliction, often plagues many people. As the saying goes, “Illness enters by the mouth.” As the first station of the digestive system, the oral system is often characterized by a variety of disorders, including endodontics, periodontal disease, oral mucosal disease, etc. In addition to this, there are many systemic diseases that are reflected in the oral organs. Oral hygiene to maintain good or bad, to a large extent, affect the occurrence of oral diseases, so oral prevention should be advocated as the main. Brushing is one of the most common and effective methods of oral disease prevention. Brushing can not only effectively remove food debris left in the dentition, periodontal, but also massage the gums. To completely remove plaque and soft tartar from the mouth, you must first master the correct method of brushing, and secondly, have enough time and patience. There are many kinds of brushing methods, which is relatively simple and effective can be recommended rotary brushing method, the main operating principles from the gums to the crown of the teeth rotating brush, to ensure that every corner of the teeth can be cleaned to the neighboring surfaces can be recommended to use floss cleaning. In the prevention of oral diseases, regular oral examination and care is essential, we should change the past only sick to go to the hospital attitude, and actively take the concept of prevention is better than cure, care for their own oral cavity.