Worldwide monitoring shows that the ongoing global warming process has enhanced the extent and increased the frequency of drought events in some subtropical regions. The co-occurrence of elevated temperature and drought can generate great effects on the growth and distribution of plants. In this study, we investigated the effects of combined stress of elevated temperature and drought on water transportation of Robinia pseudoqcacia Linn. seedlings in a controlled greenhouse experiment. The results showed that the specific conductivity (K_s) and hydraulic conductivity (K_h) of seedlings decreased with the increase of stress level. The minimum levels of K_s (3.6% of the controlled level) and K_h (5.3% of the controlled level) appeared in the treatment of 40 ℃ with 40% of field capacity. The stomatal conductance and transpiration rate reached their maximal levels in the treatment of 33 ℃ with 70% of field capacity, and then decreased in the treatment of 40 ℃ with 40% of field capacity. However, in the latter situation, the values were still higher than those in the controlled treatment. The compensation effect of rewatering also decreased with the increasing of stress level; and all related indicators showed signs of recovery only in the treatments of single stress at low levels, but not in the treatments of single stress at high levels or in the treatments of combined stress. These results suggest that compared to the single stress of elevated temperature or drought, their combined stress has greater negative impacts on the water transportation of Robinia seedlings, and also can inhibit the compensation effects of rewatering.