1. College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China;
2. Key Laboratory of Applied Geophysics, Ministry of Land and Resources, Changchun 130026, China;
3. CCTEG Xi'an Research Institute, Xi'an 710077, China

Shot separation process will inevitably lose some useful information, in order to solve this problem, the authors set up model experiments, which transformed blended acquisition data into frequency domain common offset gathers for F-K filter pre-processing, and suppressed most blended noises in the process of preserving seismic event. The authors then transformed the data to time domain common offset gathers for small window median filter, and designed iteration formula to undertake Curvelet threshold iteration denoising for common receiver point gathers. Separation results were finally obtained by constant iterations. Both simulated synthetic and field data certify that the deblended single shot record processed by this method is clear, and has good practical application value.