Abstract: The premise of constructing the rice variety feature database is to establish the morphological difference characteristics of rice varieties. The paper quantified 41 morphological characteristics of 31 rice varieties using Image Pro Plus software, and 9 morphological characteristics that reflected the differences of rice varieties were obtained using the discriminant analysis method.There were 4 geometrical shapes（Aspect,Area,Axis （minor）,Axis （major））, and 5 color characteristics（Density（max）,Density（green）,Density（mean）,Density（blue）,Density （std））. The results obtained by clustering analysis of 31 rice varieties were consistent with the results obtained by clustering analysis of 41 morphological characteristic values, indicating that these 9 characteristic values could replace 41 morphological characteristic values and express the differences among rice varieties.

Key words: rice varieties, morphological differences, the characteristic values