Abstract: Nickel-based superalloys are wildly used in modern aviation and nuclear industries. This paper mainly introduces the research status of diffusion bonding, the closure mechanism of voids at the interface, and the microstructures and mechanical properties of diffusion bonded joints. The latest research on diffusion bonding of nickel-based superalloys is summarized, which provides theoretical support for the further development of diffusion bonding of nickel-based superalloys in the future.