This study aimed to explore how air pollution and green space influence ICE recurrence and whether they might interact with each other. A case-cross design was used in this study, which was carried out in Tianjin, China. A total of 8306 patients with recurrent ICE were collected from 2019 to 2020. The maximum effects of PM 2.5 , PM 10 , SO 2 , NO 2 , CO were 1.012 ( 95%CI : 1.004, 1.019), 1.010 ( 95%CI : 1.004, 1.016), 1.035 ( 95%CI : 0.982, 1.091), 1.067 ( 95%CI : 1.043, 1.091) and 1.012 ( 95%CI : 1.004, 1.021) , respectively, and the risk was higher in males and in the 50-60 age group. In the stratification of greening, it was found that air pollution except O 3 had the highest risk of ICE recurrence for those with lower green space. Our study found that air pollution (except O 3 ) can increase the risk of ICE recurrence, and this risk can be reduced by increasing green space.