The Beibuwan Basin is rich in oil and gas resources. However, due to the complex faults, the seismic imaging of the Weizhou Formation and Liushagang Formation in the Paleogene is poor, which restricts the precise implementation of deep traps. Analysis suggests that the key reasons for the poor imaging of complex faults in this area are the acquisition with narrow azimuth, low coverage fold, weak illumination, and processing difficulties with amplitude preservation denoising and characterizing rapid velocity changes. In order to resolve this difficulties, quantitative evaluation techniques for acquisition parameters with azimuth-offset-coverage is propoesd, and anisotropic migration imaging based on full waveform inversion velocity modeling are proposed for the OBN seismic data. The research significantly improved the quality of seismic data in the complex fault zones of Beibuwan Basin and achieved good application results.