In order to explore the new classification reference index for the Chinese pear. In the experiment, the important genotypes of the genus Pyrus and its allied genera (Cydonia oblongs) used as materials. The leaf chlorophyll content, the color value L、a、b were determined using a colorimeter and a chlorometer. The colour parameters H、h and C were calculated. The correlation and clustering analysis were carried out based on these data. The results showed that there was significant difference in leaf color parameters between genus Pyrus and its allied genera, the genus Pyrus were divided into different categories on the basis of leaf color parameters, the clustering analysis results were basically consistent with the natural classification. The close population of genetic relationship was divided into together. In addition, interspecific hybrid and the types of classification difficulty were able to get a reasonable explanation. The results showed that the leaf color parameters in the genus Pyrus may be a suitable index to assess the classification of the genus Pyrus. The investigation could provide a reference for the future taxonomy of the genus Pyrus and the development and utilization of germplasm resources.