Abstract: The study on the water ecophysiological Characteristics of Caragana korshin skil shows that the transpiration rate (Tr) was 395.1±234.4 mg·g-1·h-1; the small branch water potential (Wp),-1.588±0.583 Mpa; the leaf water content (Wc), 60.12±3.29% and the transpiration coefficient, 72.82±19.88 gH2O·gDW-1. The correlations between soil water content and the Tr,Wp and Wc were statistically significant. The drought resistance was much stronger in the drought period (from June to July) and at the end of autumn (in October)than in the rapid growing periods (in May and from August to September), resulting from the responses to the annual changes in the growth and developmental stages as well as the environmental water conditions, from June to September, the Tr, the Wp and the Wc, respectively, were correlated negatively with the drought resistance index.