Abstract: In this study, the Zoysia japonica,Festuca elata,Lolium perenne,Cynodon dactylon and Poa annua were selected as experimental materials to determine the effects of different concentrations of reclaimed water irrigation on seed germination and the metabolism of reactive oxygen species and the content of hormones during germination.During the process of experiment, 3 irrigation concentrations of reclaimed water, namely 30%（T 1）,60%（T 2） and 100%（T 3） were set, and the water irrigation as the control.The results showed that reclaimed water irrigation could inhibit the germination of turf grass seeds to some extent.With the increase of reclaimed water concentration, the germination percentage, germination potential, germination index and gibberellin（GA₃） content of grass seeds decreased gradually, while the H₂O₂ content, O₂^-· production rate, malondialdehyde（MDA） content, relative electrical conductivity and abscisic acid（ABA） content increased gradually.The activities of superoxide dismutase（SOD）,peroxidase（POD）,catalase（CAT） and ascorbate peroxidase（APX） were firstly increased and then decreased with the increase of reclaimed water concentration, with 60% concentration as the dividing line.There were significant differences in the sensitivity of 5 turfgrass seeds to reclaimed water, and the tolerance of F. elata and C. dactylon roots to reclaimed water was significantly higher than that of Z. japonica,L. perenne and P. annua,which was mainly caused by the differences in antioxidant capacity and hormone content.