Abstract: One-year-old seedlings of Pterospermum kingtungense were selected as materials,effects of soilmoisture and light intensity on growth（aboveground biomass,underground biomass,leaf number and plantheight）and photosynthetic characteristics（net photosynthetic rate,transpiration rate,stomatal conductance,intercellular carbon dioxide concentration,stomatal limiting value and instantaneous water use efficiency）of P.kingtungense seedlings were investigated respectively.Two-factor of controlled test was analyzed.Six soilmoisture gradients（100%,90%,80%,60%,40% and 30% field capacity）and four light intensity gradients（100%,75%,50% and 25% full light）were designed respectively.The results showed that:（1） With thedecrease of soil moisture,the growth index and photosynthetic characteristics of P.kingtungense seedlings firstincreased and then decreased,and generally reached the peak in W2（32.11%）or W3（28.54%）treatment.Itperformed worst under drought stress（W6）.（2）With the decrease of light intensity,except stomatic limitations （L_s）,the four growth indexes and other five photosynthetic characteristics of P.kingtungense seedlings showed atrend of first increasing and then decreasing,and all of them performed best under the light intensity of L2（75%full light）or L3（50% full light）.（3）The comprehensive evaluation scores of different soil moisture and differentlight intensity showed that the comprehensive evaluation score of W2 soil moisture or L2 light intensity was thehighest respectively,which proved that the appropriate soil water environment and moderate shading were themost suitable for the growth and photosynthesis of P.kingtungense seedlings.（4） The results of binary linearregression analysis demonstrated that soil moisture and light intensity had significant effects on the growth andphotosynthesis of P.kingtungense seedlings,respectively.This study elucidates the mechanism of soil water andlight on regeneration of P.kingtungense seedlings,and could provide a theoretical basis for seedling breedingand population recovery and reconstruction in the future to a certain extent.