In the present work, 16 quantitative traits of natural triploid hybrid.Miscanthus x giganteus were analyzed using the method of variation analysis, principal component analysis and cluster analysis. The results showed that: (1) their variation coefficients ranged from 14.41% to151.85% with the means of 51.22%，which indicates that the variation of crossbreed is wide.(2) The principal component analysis results showed that the first four principal components can reflect 80.206% of the original variable information. The contribution rate of the first principal component is 48.74%, which is mainly contributed by the traits of tiller number per plant, cluster diameter, transect circumference, fresh weight per plant, and dry weight per plant；the second principal component contribution rate is 16.313%,which is mainly contributed by the traits of outside diameter, inside diameter, dry weight per stem, fresh weight per stem and moisture content；the third and fourth principal component contribution rate is 7.775% and 7.378% ,which is mainly composed by the trait of nodal bud number per stem,and the leaf number per stem respectively.(3)The cluster analysis results showed that 66 natural hybrid progeny and 6 female parent of Miscanthus x giganteus germplasm were divided into 4 groups.The first group is composed by the material with low biomass yield.The materials in the second group are suitable for breeding because the variation coefficient of all their traits is generally small and stable. The materials in the third group are characterized to keep evergreen and then are identified to be suitable for biogas fermentation or silage grass.The traits of yield and yield components of the materials belong to the fourth group are obviously superior to the female parent, indicating that they are good breeding materials.These above provide theoretical and material basis for screening and evaluating miscanthus germplasm and miscanthus breeding.