Abstract: Elastic parameter inversion from prestack seismic amplitude data has an extensive application in the lithology and hydrocarbon prediction.Inversion algorithms as well as the quality of input data often exhibit direct impacts on its accuracy.As the basic data of prestack seismic inversion,the quality of CRP gather data has huge effects on inversion results.Based on the purpose of enhancing inversion accuracy,the key technologies of CRP gather data conditioning are presented.The value of this data conditioning method is verified by matching optimized CRP data with AVO response of well log,meanwhile,the improvement of inversion results are well demonstrated by analyzing from aspects of wavelets,S / N and residual error.Expectedly,and a desirable inversion result have been achieved,after this set of CRP data was successfully applied in prestack AVA simultaneous inversion in Tannan area of Tamuchage basin.