Abstract:To study the distribution and utilization of Pi-b and Pi-5 in rice varieties of northeast China. 68 rice accessions, including 52 collected from Heilongjiang, Jilin and Liaoning and 16 introduced materials, and 31 rice lines with different blast resistance genes were used as experimental materials in this study. Pi-b and Pi-5 of the 68 rice materials were detected by functional markers of Pi-b and Pi-5 and inoculated by the dominant physiological races in Heilongjiang Province. Results showed that positive control BL1 and nine cultivars:Shennong 265, Liaojing 371, Liaojing 9, Liaoxing 1, Zhongliao 9052, Jijing 53, Jijing 94, Kendao 19 and Kennuo 2 contained the Pi-b gene, the positive control Tetep and eight cultivars :Yanjing 68, Jijing 53, Guandong 107,Jiyujing,Jiudao 44,Kongyu 163,Longjing 37,Zhong 156 contained the Pi-5 gene. In which Jijing 53 contained both two genes. The inoculation identification revealed that Pi-b and Pi-5 were invalid in Heilongjiang province. By the inoculation identification of 16 introduced materials and 31 rice varieties with different blast resistance genes, some blast resistance genes such as Pi-3、Pi-7(t) 、Pi-9(t)、 Pi-12(t)、 Pi-20、 Pi-ta2 、Pi-zt 、Pi-24、Pi-25、Pi-gm showed potential utilization value. The results was of greatimportance in the rice production and rice blast resistance breeding in the northeast of China.