Background In patients with acute coronary syndrome(ACS),lower admission systolic blood pressure (SBP) levels infer a worse prognosis.However,the predictive potential of admission SBP on 1-year mortality has not fully elucidated in patients with non-ST-segment elevation ACS(NSTEACS).Methods We enrolled 1325 patients to investigate the association between admission SBP in patients hospitalized for NSTEACS.We analyzed the association between admission SBP and 1-year mortality.Admission SBP was categorized as low (＜110 mm Hg),normal (110-140 mm Hg),high (141-160 mm Hg),and very high (＞160 mm Hg).Results Compared with patients with normal admission SBP,those with low SBP had a significantly increased hazard ratios (HRs) for 1-year mortality of 3.03(P ＜ 0.05),while patients with high and very high admission SBP had no significantly in-creased HRs for 1-year mortality.Conclusion Low admission SBP,but not elevated admission SBP,is a strong independent predictor of 1-year mortality in patients with NSTEACS.