NPPB and angina unstable: It is concluded that the Shuxuening injection combined with conventional Western medicine could improve the onset of unstable angina frequency, reduce the dosage of nitroglycerin, and improve ECG, the blood lipid, CRP, and BNP, but the quality of all included studies was low, so the more higher quality of clinical randomized controlled trials will be needed to further demonstrate the validity of Shuxuening injection combined with conventional Western medicine in the unstable angina.