Abstract: In order to improve hybrid rice restorer line R838 blast resistance levels, this study used the MAS means to put the blast resistance gene pigm into the target receptor, through their continuous multi-generation backcross, our molecular markers of its backcross progeny and blast resistance phenotype. Screening of high-generation backcross populations inbred, and the measurement with three-line sterile lines. The results showed that, 52.4% of F1 share of the target gene, with the increase in backcross, its share of the target gene stable at around 50%, through high-generation backcross seedling blast phenotype, the seedling leaf blast resistance was 3-9 grade; and significant differences between strains, use the three-line sterile lines with group, the F1 seedlings leaf blast resistance increase with the selected parent resistance increase, and agronomic traits basically consistent with R838. It was an effective way to improve the target receptor’s blast resistance by using the blast resistance genes (pigm) through molecular marker assisted breeding technology.