Effects of several kinds of drugs on the vegetative growth indexes and the physiological indexes of Maodou under water stress were studied in the experiment.The results showed: promotion seedling growth, increasing the root activity,the chlorophyll content,the proline content, relative water content and protective enzyme activity ,suppressed MDA content, reduced the cell permeability compared with control after treated with these drugs, and thus effectively enhanced the resistance of the seedling to the abnormal environment. From the Comprehensive analysis on the effects of these drugs on the vegetative growth indexes and the physiological indexes, BR treatments worked best, it was successively TA, FA, Atonk and Lufeng 95.