Abstract: The principles of secondary reflection wave imaging technology based on one-way wave extrapolation are as follows:based on the conventional down-going wave field continuation of shot points and the up-going wave field continuation of the receivers,the down-going wave field continuation of the receivers is carried out again.Through the cross-correlation between the three kinds of extrapolated wave fields,the imaging of up-going wave field and down-going wave field is completed.The technique is similar to the function of inverse-time migration.A model with vertical structure is taken to briefly analyze the features of the wave field in the high and steep structure.Numerical tests were performed on both synthetic data from 2-D and 3-D high and steep structure models.The results show that the steep reflection with the dip angle larger than 90° can be imaged accurately.The technique was applied to the actual seismic data from some piedmont zone,and good results were achieved.The fuzzy layer boundaries in conventional migration profile are clear on the new migration profile acquired by the technique.