[Objective] To classify 40 flax germplasm resources.[Method] The RAPD and UPGMA methods were adopted to analyze the and resources.[Result] 11 polymorphic RAPD primers were selected from the tested materials.71 clear polymorphic bands were generated,and the polymorphism rate reached 88.8%.The UPGMA cluster analysis results showed that the species from close geographical locations were clustered into one group.[Conclusion] The study provided theoretical basis for the identification,classification and effectiv...