Aiming at problem which although synthetic aperture sonar is a new type of high resolution underwater imaging sonar,especially that it is an advanced technology for high precision measurement of seafloor topography and has great application prospect,sonar Synthetic Aperture Interferometry has not been widely used now,the research status and the research progress of the recent research on the synthetic aperture interferometry of the sonar are analyzed in detail.In this paper,based on principle of interferome...