Abstract: Shale oil exploration in China has entered a new field. As shale oil reservoir is much more complex than conventional reservoir, the improvement of imaging accuracy of shale oil reservoir is the key to shale oil seismic exploration. The wide-azimuth 3D seismic technique is widely used in seismic exploration currently as it can solve relatively difficult geological problems while providing high-quality seismic data. Taking the study area Y88 in Qijia-Gulong depression of Songliao Basin as an example, the paper conducts shale oil reservoir processing by wide-azimuth data, and analyzes the characteristics of wave field, signal-to-noise ratio and frequency. On this basis, the processing flow of wide-azimuth data is determined and the wide-azimuth and broadband high-resolution amplitude-preserving processing technique is adopted for better imaging.