The content of available P in soil had significantly positive relationship with the relative yield of wheat when no P was applied.Wheat relative yield <50%,50% to 65%,65% to 75%,75% to 95% and>95% of the corresponding soil available phosphorus indicators could be drawn.The very low，low,medium,high and very high index for soil available P were ＜7 mg/L,7～12 mg/L,12～18 mg/L,18～38 mg/L,＞38 mg/L,respectively.This experiment suggested that the recommended fertilizer quantity were 135 kg/hm2，105 kg/hm2，90 kg/hm2，60 kg/hm2.When soil available P was＞38 mg/L，the fertilizer quantity could be reduced or not applied.