Abstract: Synthetic acoustic full waveforms of CBL (Cement Bond Log)/VDL (Variable Density Log) at the perfect bonding (steel-cement-formation) are calculated for the light and high weight cement in the sandstone-shale cased borehole. Through examining the changes of formation porosity and shale content,the effects of the cement and formation properties on formation body wave amplitude are analyzed. These results demonstrate that the influence of the cement properties on the formation body wave amplitude is very small,but that of the formation properties is rather obvious. Therefore,We have pro-posed a correcting method for the formation body wave amplitude that is impacted by the rock properties with the changes of formation porosity and shale content. According to the result of theoretical research and specialty of waveform recording in oil field,acoustic bonding indexes of the first interface (steel-cement) and second interface (cement-formation) are derived from the casing arrival and formation body wave amplitudes. The application in Xibei oil field shows that this method is effective for evaluation of the cement bonding quality.