Abstract: Six tree species(Ormosia hosiei Hemsl. et Wils, Photinia×fraseri ‘Red Robin’, Schima superba, Zelkova schneideriana, Salix×jiangsuensis cv. ‘J172’， Prunus cerasifera ‘Hollywood’) were conducted to compare the difference of photosynthetic characteristic and drought resistance. Results showed that there were great differences of photosynthetic characteristics of these six tree species during 10 d drought stress period. Photosynthesis of Prunus cerasifera ‘Hollywood’ and Salix jiangsuensis cv. ‘J172’ were much more sensitive to drought stress, of which there were significant decline of photosynthesis after 10 d drought stress due to stomatal limitation. In Zelkova schneideriana, stomatal limitation appeared after 4 d drought stress, however, the photosynthesis level return to normal level in the 10th day. In contrast, there was no stomatal limitation in Ormosia hosiei Hemsl. et Wils, Photinia fraseri ‘Red Robin’ and Schima superba during drought stress period. According to the Ci and Ca ratio of six tree species of normal irrigation during the 10 d period, the drought resistant ability arranged in descending order was Ormosia hosiei Hemsl. et Wils, Schima superba, Zelkova schneideriana, Photinia fraseri ‘Red Robin’, Salix jiangsuensis cv. ‘J172’, Prunus cerasifera ‘Hollywood’.