With the accelerated development of population aging，the elderly are an important group in the whole society，and their overall health status is the focus of every family and even the whole society. In terms of the health problems of the elderly，in addition to systemic diseases，oral health has also received much attention，among which the problem of tooth loss caused by periodontal disease is particularly prominent. Periodontal disease，as a kind of disease that seriously affects human oral health，should receive the attention of the whole society for its disease characteristics and related problems such as prevention and treatment. This article will focus on the following two aspects，namely：the characteristics and treatment of periodontal disease in the elderly；the prevention of periodontal disease in the elderly；to describe the characteristics and prevention of periodontal disease in the elderly，in order to advocate the whole society to pay more attention to the oral health of the elderly.