Dental caries is the most oral common disease，which runs through the whole life and is closely related to general health. The occurrence and progression of caries in the elderly have some characteristics due to the multiple systemic diseases and the aging changes of organs. Therefore，the preventive measures of caries for the elderly not only include the instruction of dietary habits and oral health habits，but also encourage them to pay more attention to oral health. Addition to following the basic principles of caries treatment，the general health and psychophysiological characteristics of the elderly should be taken into account. Selecting the appropriate treatment and materials according to the location and severity of caries is recommended. Finally，developing a personalized treatment plan of prevention，control and repair.