Abstract: Compared to conventional offshore streamer seismic technology, marine multi azimuth fusion technology has suppressed the acquisition footprint to improve signal-to-noise ratio, increase the illumination and improve the quality of seismic data imaging as well as other advantages. And the marine multi azimuth fusion technique can be easily realized with conventional offshore seismic streamer equipment only. Aiming at the high water cut and the production pressure in the late stage of YB oilfield and the difficulty for evaluating oilfield target in the east of the Pearl River Mouth Basin, the multi azimuth fusion seismic technology was suggested. It is proved by application that the multi azimuth fusion seismic technology is more favorable for the stable production of the oilfield and the discovery of the surrounding reserves.