Abstract: The Multi-channel Analysis of Surface-Wave (MASW) method has many applications in undestructive detection of the quality of railway subgrade and karst grouting, but its resolution is not high, which limits the application of the method. For the problems of MASW, Common Mid Point Cross Correlation (CMPCC) two-dimensional surface wave method can improve the lateral resolution significantly, but in the case of complex under-foundation, two-dimensional shear wave velocity section reconstructed by one-dimensional inversion of the dispersion curve, may distort and/or loss a lot of underground information, which can result in analysis and interpretation errors. Through the comparative analysis of a large number of data, firstly we define Absorption Scattering Coefficient(AS), which is one the dynamic parameters of the surface wave propagation, and propose a new absorption and scattering comprehensive analysis method based on CMPCC two-dimensional surface wave (ASCA). Therefore good results have been obtained in many projects:(1)The Absorption and Scattering Coefficient (AS), charactering the dynamic properties of the surface wave propagation, and the phase velocity (c), the kinematic properties, in conjunction with the comprehensive interpretation, can significantly improve the spatial resolution and accuracy of and the anomalous properties;(2)inheriting the advantages of CMPCC algorithm, give up one-dimensional inversion of the dispersion curve, data processing without human impact, section are simple and direct, easy analysis;(3)It has a wide application prospect in the shallow investigation of foundation settlement and collapse, foundation treatment and grouting detection, loess collapsibility, active fault location determination and so on.