Common smut in maize reduces grain yield greatly. lines play an importment role to minimize the losses caused by common smut. At the elongation stage, Ustilago maydis fungus was injected into 8 maize chromosome segment introgress lines(CSILs). Eight CSILs have different chromosome segments of donor maize HB522 respectively.There are four kinds of varieties in eight CSILs. is highly resist to common smut. Chr3-7’s grain yield is highest among other seven CSILs and two parents. chr3-7 is good SSILs for Resistance to common smut study and resistance breeding.