Objective To observe the effect of alprostadil combined with tirofiban ( platelet glycoprotein IIb /IIA-receptor blockers) before acute percutaneous coronary intervention ( PCI) in prevention of no-reflow during operation. Methods A total of 70 acute myocardial infarction patients were randomized into trial group and control group ( n = 35) . Before operation,all patients were given 300 mg of aspirin and 600 mg of clopidogrel conventionally. Both groups were administrated with tirofiban,and the trial group used alprostadil in addition. Results There was no postoperative difference in TIMI grade 3 between the two groups,but TIMI myocardial perfusion( TMP) grade 3 improved more significantly in the trial group than in the control group( P < 0. 05) . Left ventricular ejection fraction ( LVEF) was similar within one week between the two groups. Conclusion Using alprostadil combined with tirofiban before emergency PCI can further improve the myocardial perfusion,and lower the incidence rate of no-reflow.