The study examined the effect of a 12-month community-based intervention on 721 patients aged 18–80 years with high-normal blood pressure. After one year of the health management intervention led by the community physician, both systolic and diastolic blood pressure decreased significantly. At the same time, patients' knowledge of hypertension, awareness of prevention and adherence to treatment improved. The analysis showed that poor medication adherence due to adverse drug effects was associated with poor blood pressure control. Furthermore, continued smoking and higher body weight were found to be factors associated with uncontrolled diastolic pressure. Reducing alcohol consumption has been shown to be a factor influencing uncontrolled systolic pressure. The results suggest that community-based primary care interventions can effectively improve blood pressure control in people with high normal pressure.