Objective To investigate the prevalence and determinants of cognitive frailty among institutionalized older adults, and to provide evidence for targeted intervention. Methods A total of 303 older adults were selected from 13 elder-care institutions in 6 urban areas of Chongqing by using convenience sampling method, and were investigated with general information questionnaire, Short-Form Mini-Nutritional Scale （MNA-SF）, the Geriatric Depression Scale-15 （GDS-15） and Loneliness Scale.The cognitive frailty was evaluated by the Frailty Phenotype （FP）, Montreal Cognitive Assessment （MOCA） and Clinical Dementia Rating （CDR）. Results Among 303 institutionalized older adults, 126 （41.6%） had physical frailty,116 （38.4%） had mild cognitive impairment and 82 （27.1%） had cognitive frailty.Logistic regression analysis showed that education level, living environment, phy-sical exercise, intellectual activity, chronic diseases and depression were predictors of cognitive frailty (P＜0.05,P＜0.01). Conclusion The prevalence of cognitive frailty is high in institutionalized older adults. Medical staff should pay attention to cognitive frailty of institutionalized older adults and provide targeted and comprehensive interventions, thus to delay or alleviate the development of cognitive frailty.