Abstract: In this paper, six primary selected one-year-old seedlings of Zanthoxylum L. were selected as experimental material, and the growth rate, plasma membrane permeability, relative water content of leaves and damage of plants of the root stocks under different drought treatments were measured by pot experiment. The drought resistance of the six rootstocks was comprehensively evaluated by membership function method. The results showed that: Chuan Zhi-3, a wild material of Zanthoxylum L., showed relatively little changes in growth and relative water content of leaves, little change in plasma membrane permeability, and mild drought symptoms duting the whole drought stress process, indicating that its drought resistance was significantly better than other candidate materials.