In this study, the strains with 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity were isolated from an oil-polluted soil. The ACC deaminase activity of the strain D5A was 0.084 U/mg in minimal medium containing ACC as the sole nitrogen source. In addition, D5A also had properties of producing indole acetic acid (IAA), salt tolerance and dissolving phosphorus. In liquid culture conditions, the strains produced IAA up to 112 mg/L. It was still able to grow normally in the medium of 90 g/kg salt and had a strong ability to dissolve the mineral phosphorus. The strains grew well in LB medium from the initial pH value of 4 to 10, which showed the strains had good adaptability of pH. Seed germination tests showed that the strains could significantly improve seed germination and bud of tall fescue(Festuca arundinacea) at adverse conditions of 3?g/kg and 6?g/kg NaCl. Finally, based on physiological, biochemical characteristics and 16S rDNA sequence analysis, the strains was identified as Klebsiella sp.