The performances of 18 mungbean germplasm were investigated with repeat drought stress at seed-ling stage. Four kinds of drought tolerance of mungbean germplasm resources were screened by subordinative func-tion analysis. The resistant type included ‘Tao 98502’, ‘Jilü 2’, ‘Jilü 11’, ‘Jilü 9’. 7 accessions were identified asmoderately resistant and 7 were susceptible types. Under repeat drought stress, total root length, root dry weight andplant dry weight were significantly positive correlated with subordinative values. So the total root length, root dryweight and plant dry weight were recommended as drought tolerance index for screening germplasm resources ofmungbean at seedling stage.