To screen rootstocks for cucumber grafting with tolerance to low temperature, weak light and salt stress, three-leaf seedlings of fifteen cultivars were treated in growth chamber (5 ℃ and 100 μmol·m2·s-1 PAR) or in NaCl solution (100 mmol·L-1), the growth and physiological parameters were investigated, and the tolerance was evaluated by establishing subordinative function value and by using principal component analysis and regression analysis.