OBJECTIVE: To investigate the incidence of hypertension in elderly people over 65 years of age and to analyze the factors associated with poor blood pressure control. METHODS: A self-designed hypertension-related knowledge questionnaire was used to investigate 50 cases of elderly hypertensive patients, and logistic regression was used to analyze the factors associated with poor blood pressure control. Results: There were 50 cases of elderly hypertensive patients aged 65 years and above in this community, with a prevalence of 68.5%. The prevalence was significantly higher in women than in men (64±6.9% v.s. 36±6.5%, P < 0.05). The pre-control systolic blood pressure level was higher in patients aged 75 years and older than in those aged 65-75 years (mean: 179±10.3 mm Hg v.s. 165±8.7 mm Hg, P < 0.05), and there was no significant difference in diastolic blood pressure (mean: 101±9.7 mm Hg v.s. 105±8.1 mm Hg, P > 0.05); pure systolic The incidence of pure systolic hypertension was higher than the incidence of non-systolic hypertension (58±7.2% v.s. 42±6.7%,P〉0.05). The results of the analysis of factors associated with poor blood pressure control showed that poor blood pressure control among elderly hypertensive patients was significantly correlated with smoking, alcohol consumption, obesity, regular exercise, regular review, knowledge of the disease, compliance with medical advice, self-monitoring of blood pressure, emotional and mental status, economic level, literacy and organic diseases (P < 0.05). Conclusion: Elderly women aged 65 years and above in the community are prone to hypertension, mainly simple systolic hypertension, and blood pressure increases with age; blood pressure is easier to control in patients with profound knowledge of the disease, good compliance with prevention and treatment, and no significant multi-organ disease, in addition to good emotional and mental state, and affordable long-term treatment costs.