By means of Kira's method of two kinds of climatological indexes, the warmth index and the coldness index, the correlations between the distribution of seven everygreen broad-leaf tree species in Jiangsu and climate were analyzed:1. Thermal distribution curve of 7 tree species in Jiangsu is close to a Gaussian distribution curve essentially.2. The optimal range of warmth index were calculated by using calculating formula of PWH (peak width at half height).X =mean S= standard deviation.PWH =2.354·S optimal r...