Objective To evaluate the association between short-term outcomes and collateral circulation status in patients with acute ischemic stroke receiving thrombolysis therapy.Methods Full-text articles published from January 2000 to November 2016 in Cochrane Library,Medline,Embase and Web of Science electronic database were retrieved and their quality was assessed.The association between short-term outcomes and collateral circulation status were analyzed by random-effects models.Results Twenty three studies involving 2 849 patients were included in quantitative synthesis.The results showed that good collateral circulations had a beneficial effect on favorable outcomes at 3 or 6 months (RR =2.26,95％ CI:1.85-2.77,P =0.00),and were also associated with a lower rate of symptomatic intracranial hemorrhage (RR =0.56,95％ CI:0.47-0.67,P ＜ 0.01) and a lower rate of mortality (RR =0.30,95％ CI:0.22-0.40,P ＜ 0.01).Conclusion The baseline collateral cimulation status is associated with the short-term outcomes in patients with acute ischemic stroke receiving thrombolysis therapy.