Pot experiments were conducted with pakchoi as test crops to study the effect of application ammonium and nitrate on the phosphatesolubilizing activity of phosphate solubilizing bacteria fermentation broth，growth and quality of pakchoi.Obtained results showed that application of single form of nitrogen fertilizer,the effect of fermentation broth(T3) was better than that of the bacteria suspension(T2) and the supernatant(T1).When combined application of fermentation broth and nitrate nitrogen,the efftct was better than that with ammonium nitrogen,which was reflected in the increase of soil available phosphorus content,more crop yields and better nutritional quality.The better pakchoi nutritional quality included higher contents of Vc,solubilizing sugar,solubilizing protein,cellulose,phosphoruse and less nitrate content.Therefore,phosphate solubilizing bacteria fermentation broth could be used instead of phosphatic fertilizer in pakchoi production,whats more,nitrate was better nitrogen source for PSB strain W1.So it would have a great increase of pakchoi yield and nutritional quality when combining application with nitrate nitrogen.