The present experiment was carried out to minimize the harmful effects of water stress induced by NaCl or polyethylene glycol 6000 on soybean germination percentage and seedling growth (fresh and dry weights as well as seedling length) through presoaking seeds in AsA or α-Toco at 50 and 100ppm. The low levels of NaCl(-2 bar)  increased germination percentage and seedling fresh and dry weights significantly, but PEG 6000 (-2 bar) was no significant differences, whereas increasing NaCl or PEG 6000 concentration up to -4 bar caused a decrease in this respect. The great reduction occurred under high level of NaCl or PEG (-6 bar) as compared to control. Presoaking seeds in AsA or α-Toco were markedly increased soybean germination percentage and seedling growth. In addition, ascorbic acid at 50 ppm and α-tocopherol at 100 ppm was more effective under NaCl(salinity stress) than PEG 6000 (drought stress). The low levels (-2 bar) of NaCl or PEG were no significant differences in seedling length, while this parameter was significant decrease at -4 bar of water potential and these decrease was frequently dependent on NaCl and PEG concentration . Generally, both AsA and α-Toco counteracted the harmful effect of stress on soybean seedling weight (fresh and dry) against different stress levels. In addition, α-Toco was more effective than AsA to reduce the effect of stress on seedling fresh and dry weights.