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Purpose: To investigate the periodontal health status of type 2 diabetes patients in the Endocrinology Department of Shanghai Sixth People's Hospital, to explore relevant influencing factors of chronic periodontitis, so as to provide epidemiological basis for targeted prevention and treatment of periodontal diseases in patients with type 2 diabetes., Methods: Periodontal examination and questionnaire survey of patients with type 2 diabetes who visited the Endocrinology Department of Shanghai Sixth People's Hospital from November 2018 to December 2018 were conducted. Criteria in "Basic Methods for Oral Health Survey" recommended by WHO was referred to check and score the relevant periodontal indicators, including probing depth, bleeding on probing, attachment loss, calculus index, plaque index, etc. Sociodemographic information, diabetes history, periodontal health-related behaviors, and other information were collected through questionnaires. SPSS 22.0 software package was used for statistical analysis., Results: Of the 916 patients with type 2 diabetes who participated in the survey, 670 patients with periodontitis were detected. The overall prevalence of periodontitis was 73.14%, and the number of missing teeth per capita was 4.85. The age of diabetic patients, the duration of diabetes, and the presence or absence of complications were risk factors for periodontitis. As the patients grew, the duration of the disease increased, and diabetes-related complications appeared, the prevalence of periodontitis in patients with diabetes increased significantly (P＜0.05)., Conclusions: Periodontal health of patients with type 2 diabetes in the surveyed region is not optimistic. Early prevention and treatment of periodontitis is extremely important. It is necessary to pay attention to the periodontal health status of elderly patients with long-term disease and diabetes, and to carry out targeted oral prevention and health care work for this population.