Objective: To explore the relationship of Traditional Chinese Medicine (TCM) Syndrome type and coronary arteriography (CAG) with respect to the number and degree of stenosed branches of coronary artery (CA) and ACC/AHA stage of acute coronary syndrome (ACS), to provide an objective evidence for TCM Syndrome typing on ACS.Methods: Ninety patients of ACS with their TCM Syndrome typing and CAG successfully conducted were enrolled in this study. They were classified into 3 Syndrome types, the blood stasis type (typeⅠ), the phlegm stagnant with blood stasis type (typeⅡ), and the endogenous collateral Wind type (typeⅢ). The scores of the number and severity of the stenosis branch of CA and ACC/AHA lesion stage in different Syndrome types were calculated respectively and analysed statistically by Ridit analysis.Results: The number of stenosed branches increased gradually with the Syndrome type changing from Ⅰ→Ⅱ→Ⅲ, compared the type Ⅲ with the other two types(P