Objective:To investigate the risk factors of cognitive dysfunction and its relationship with poor prognosis in elderly hypertensive patients with frailty.Methods:A total of 150 elderly hypertensive patients with frailty trea-ted in Eighth People's Hospital of Hebei Province from July 2019 to March 2021 were selected.According to pres-ence of cognitive dysfunction,they were divided into normal cognition group(n=92)and cognitive dysfunction group(n=58),and general data and prognosis condition were collected in two groups.Multivariate Logistic regres-sion analysis was used to analyze the risk factors of cognitive dysfunction in elderly hypertensive patients with frail-ty;Spearman correlation analysis was used to analyze the correlation between cognitive dysfunction degree and prog-nosis.Results:Compared with normal cognition group,cognitive dysfunction group was significantly older and pos-sessed significant higher proportions of diabetes,coronary heart disease,stroke,hyponatremia,multiple medication and malnutrition(P<0.05 or<0.01).Multivariate Logistic regression analysis indicated that age ≥75 years,stroke,multiple medication and malnutrition were independent risk factors for cognitive dysfunction in elderly hy-pertensive patients with frailty(OR=2.804~6.434,P<0.05 or<0.01).Incidence rate of poor prognosis events in cognitive dysfunction group was significantly higher than that of normal cognition group(51.72%vs.11.96%,P<0.001).Spearman correlation analysis showed that cognitive dysfunction was significant positively correlated with poor prognosis in these patients(r=0.435,P<0.001).Conclusion:Age,stroke,multiple medication and malnu-trition are independent risk factors for cognitive dysfunction in elderly hypertensive patients with frailty.Cognitive dysfunction is closely related to poor prognosis in these patients.