We measured the two-year-old Zhenzhuyouxing apricot’s photosynthetic physiology parameters under different soil moister conditions (RWC is from 84.7% to 22.8%) with CIRAS-2 portable photosynthesis system.The parameters include net photosynthetic rate,transpiration rate,water use efficiency and intercellular CO₂ concentration.Then we investigate the effect of soil moisture and light intensities on photosynthetic.The results show that:(1)With the decreasing of soil moisture,net photosynthetic rate,transpiration rate,dark respiration rate and light saturation point represent a tendency of decreasing;apparent quantum yield increased first,then decreased;meanwhile light compensation point decreased first,then increased.(2)When the relative soil moister were from 43.6% to 84.7%,the photosynthetic active radiation were from 800 to 2 000 μmol·m^-2·s^-1,it is good for Zhenzhuyouxing apricot to conduct higher net photosynthetic rate and water use efficiency.So we came to the conclusion that Zhenzhuyouxing apricot adapt to a wider range of soil moisture and light intensity.(3)Stomata limitation is the main reason result in lower net photosynthetic rate when the soil moister were from 43.6% to 73.5%,and non-stomatal limitation result in lower net photosynthetic rate when the relative soil water moister were less than 43.6%.Finally,we could come to the conclusion that the Zhenzhuyouxing apricot is a very strong drought resistance plant,and it is suitable to cultivating in the arid and poor mountain lands in North China.