To reveal the genetic basic of rice varieties from different countries and use rice germplasm resources effectively, the genetic diversity of 36 rice varieties from different countries was analyzed by using 63 SSR markers. As the result, 269 alleles were detected between these varieties. And 4.27 alleles were on per gene locus averagely, the average effective number of alleles was3.22, the average gene diversity of these rice varieties was 0.62, and the average Shannon's Information index was 1.16. The marker RM206, RM257, RM410, RM235 and RM266 have more alleles than 7. Rice verities from countries at the similarity latitude were aggregated together, while from countries with more different latitude were assigned to different groups. The results indicated that genetic difference between the rice varieties from different countries had a close relationship with the geographical position and the latitude.