Background and purpose: Hypertention or elevated blood pressure is the most important risk factor for the incidence of stroke, but the relationships between systolic blood pressure(SBP), diastolic blood pressure(DBP), pulse pressure(PP) , mean arterial pressure(MAP) and clinical outcome of acute stroke are still inconclusive. We studied the associations between these four admission blood pressure indexes and in-hospital death or dependency among acute stroke patients in Inner Mongolia to provide scientific evidence for the effective control of blood pressure.Method: A total of 4,761 stroke patients in six hospitals from January, 2003 to December, 2006 were included in the present study. Data on demographic characteristics, lifestyle risk factors, blood pressure, clinical laboratory test, medical history and clinical outcomes, including death and disability (Modified Rankin’s scale, MRs≥3), on discharge were all collected within the first 24-hours of hospital admission using a standard questionnaire administered by trained staff. Statistic analysis was conducted using SPSS15.0 software. The rates of case-fatality and disability were calculated and compared between ischemic stroke and hemorrhagic stroke patients, and the differences of baseline characteristics including demographic and clinical characteristics were compared between ischemic and hemorrhagic stroke patients and between patients with various clinical outcomes in each stroke subtypes. Multiple logistic regression was used to analyse the relationships between these four admission blood pressure indexes and in-hospital death or dependency among acute stroke patients,which were evaluated by the odds ratio(ORs) and 95% confidence interval(95% CI).Results: During the hospitalization, the case-fatality rate and disability rate were 1.6% and 45.5% in ischemic stroke patients and were 5.6% and 38.2% in hemorrhagic stroke patients. The rates of history of diabetes and dyslipidemia were higher for acute ischemic stroke patients (11.4%, 53.9%) compared with acute hemorrhagic stroke patients (2.2%, 44.4%), P0.05.Conclusion: Increased level of SBP, DBP, MAP on admission were all positively and significantly associated with in-hospital death and disability on discharge among patients with hemorrhagic stroke. Elevated PP was only associated with in-hospital death among hemorrhagic stroke patients. While for ischemic stroke patients, the relationships between SBP, DBP, PP, MAP and in-hospital death and dependency on discharge were not significant.