Abstract: The optimal interpolation method based on adaptive correlation functions is used to correct the Radar-derived Quantitation Precipitation Estimation in guangyuan.The result shows:this method makes great improvement regarding to the problem that radar-derived estimate precipitation overestimate weak rain,underestimate heavy rain,improves the accuracy of precipitation estimation.The spatial distribution characteristics of precipitation and the spatio-temporal variations are simulated better.The adaptive correlation function model can dynamically calculate the optimal weighting factor according to the station distribution,reduces the requirement of station distribution,which is convenient for practical application in different areas.