The treatment of periodontal disease firstly removes the disease-causing factors, secondly eliminates inflammation and other symptoms, then stops the destruction of periodontal tissues, and then gradually restores and stabilizes the state. 1. Remove the causative factors first. Perform scaling and root planing to eliminate plaque and tartar above and below the gums. Extract the affected teeth that have no preservation value or very poor prognosis, or those that are not conducive to the long-term stabilization of the overall restorative treatment effect. Loose teeth that can be retained are loosely fixed and the occlusal relationship with occlusal trauma is adjusted. 2. Eliminate symptoms such as inflammation, bleeding and pain. Need to reduce the periodontal stimulation of tobacco and alcohol. Oral anti-inflammatory drugs, such as metronidazole, etc., or the use of mouth rinses, such as chlorhexidine gargle can alleviate the inflammation and bleeding symptoms of periodontitis. 3. To stop the periodontal re-destruction, on the basis of basic treatment and medication, it is necessary to have regular follow-ups and continue to maintain good intraoral hygiene and good intraoral cleaning, such as brushing at least twice a day, rinsing after each meal, and flossing to clean the gaps between the teeth after eating, in order to consolidate the effect of the basic clinical treatment. 4. Then gradually restore and stabilize the state. When the gap is too large after scaling in patients with severe periodontitis, periodontal surgery can be performed to raise or restore the gingival papilla, restore the physiological shape of the periodontal tissues, and meet the aesthetic needs when performing restoration. Periodontal disease is tooth-specific and individual-specific, for different patients and individually designed for different treatment programs, treatment content and methods are also different from person to person, the need to develop a multi-method, orderly treatment plan, the implementation of which is a relatively long-term process.