Abstract: Spatial auto-correlation analysis was used to study the Chinese Salix characters what were employed in the paper[2] On the base of Estabrook'sformulae, we present the result of spatial auto-correlation and discuss itin the light of the traditional morphological classification. The resultshows 22 characters useful and 8 most useful, 8 characters consist of treetall, branch colour, leaf length, staminate catkin length, staminate catkinlength/thick ratio, pistillate catkin length, pistillate catkin length/thickratio and staminate catkin lengeh-pisillate catkin length difference. Wesider that 22 character, are the major aspect of recognizing Chinese Salix, conand the spatial auto-correlation analysis as a tool of analysising taxonomical characters is a good approach.