In this paper,the seismic inversion combined with the well logging,rock physics,seismic facies and the forward modeling was used to comprehensively study the characteristics of the igneous rocks.The rock physics experiment is a useful tool to study the physical property parameters of the igneous rocks.The analysis of the experimental data is helpful to predicting the igneous lithology and velocity. On such a basis,the seismic inversion is used to describe the igneous rocks by the seismic data.The environmental correction and standardization of the original logging curves is the prerequisite for high quality synthetic seismogram and inversion.The constrained sparse spike inversion,the model based inversion and the neural network inversion have higher resolution than the original seismic data.The spatial distribution of igneous rocks can be identified by them,with the model based inversion having the highest resolution.The GR characteristic inversion has higher resolution than the above-mentioned three methods.However,as a single characteristic can hardly be used to describe the characteristics of igneous rocks,the multi-parameter seismic inversion is an efficient way.The seismic facies is also used to obtain the igneous 3D velocity field.The precision of the velocity field is verified by the error analysis and forward modeling.