Abstract: Incubation and micro-field plot experiment were carried out to study the transformation and its influence factors of applied P in the meadow-cinnamon soil in Hebei Province.The results indicated that all the other inorganic phosphorus factors were formed except Ca₁₀-P in the initial stage of application,but with the process of time,there is a law of transformation among these factors.Planting crops seriously affected the transformation of applied P.