Objective To study the clinical significance of hypersensitive C‐reactive protein(hs‐CRP) in acute coronary syndrome (ACS) .Methods 45 patients with ACS were selected as the ACS group ,including 26 cases of acute myocardial infarction (AMI group) and 19 cases of unstable angina pectoris (UAP group) ;30 patients with stable angina pectoris(SAP) were selected as the SAP group and 30 health people with healthy physical examination in the outpatient department as the control group .The latex‐en‐hanced immunoturbidimetry was adopted to detect the serum hs‐CRP levels in all selected subjects and the detection results were compared .Results The serum hs‐CRP level of ACS and SAP groups were significantly higher than that of the control group with statistical difference (P< 0 .01) .The hs‐CRP level of AMI and UAP groups was higher than that of the SAP group with statistical difference (P< 0 .05) .Conclusion hs‐CRP is an independent risk factor for ACS and one of the most powerful predictors ,able to quickly and accurately conduct early diagnosis ,risk stratification ,condition monitoring and prognosis judgment in the patients with ACS .