Abstract: Objective To investigate the status and influencing factors of mild cognitive impairment （MCI） among elderly patients with type 2 diabetes mellitus （T2DM） in community. Methods A multi-stage sampling method was adopted to conduct a questionnaire survey on elderly T2DM patients aged 60 years and above in communities of Weifang City, and a Mini-Mental State Examination （MMSE） was used to screen MCI patients. Based on the health ecological aspect, stratified logistic regression was used to analyze the influencing factors of the occurrence of MCI in five aspects： individual characteristics, individual behavioral characteristics, interpersonal network, working and living environment, and policy environment. Results A total of 2 782 elderly T2DM patients in Weifang City were included, and 286 cases （10.28%） were diagnosed with MCI. Stratified logistic regression analysis showed that 70-79 years old（OR=1.432）, overweight or obese （OR=0.688, 0.584）, and comorbidities hypertension or hyperlipidemia （OR=1.880, 1.930, 1.953） among individual characteristics, exercise （OR=0.668） among individual behavioral characteristics, middle school education （OR=0.633） and retirement （OR=0.474） in working and living environment, and low economic level of residence （OR=1.409） in policy environment were associated with MCI among elderly T2DM patients in community. Conclusions The incidence of MCI is high in elderly T2DM patients in community, and its influencing factors are multi-layered. The intervention of patients should be strengthened from individual to environmental factors to delay or prevent the progression of MCI to dementia.

Key words: Health ecological model, Type 2 diabetes mellitus, Mild cognitive impairment, Influencing factor