The concave green land is one of the measures of low impact development for urban construction. To evaluate the effects of the concave green land on regulating urban surface runoff, this paper calculates the rainwater infiltration rate, critical depth of depression, critical area ratio of the concave green lands under different rainstorm periods. The construction schemes of concave green land in the study area were designed, and the runoff interception effect and peak flow reduction effect of each scheme were compared and analyzed. The results showed that when the rainstorm return period was 3, 5 and 10 years, both the interception effect and the peak flow reduction effect of the two concave green space construction schemes with different concave depths (0.15m,0.2m) and different concave green land rates (20%~45%) in the study area can reach more than 99.92%. The concave green lands have significant effects on regulating urban surface runoff.