Abstract: The ring chain is widely used in mining machinery,marine ships and military vessels because of its large carrying capacity,reliable work,convenient disassembly and excellent transmission performance. In recent years,higher requirements for high strength and high toughness of the ring chain had been put forward with the development of marine equipment and coal mine machinery,as well as its welding technology have been gradually improved. Flash butt welding had been used in chain production as an efficient and applicable solid phase welding method. In view of the structural characteristics of high strength ring chain,the process characteristics of ring chain pulsed flash butt welding were summarized. The development of ring chain steel welding technology,the high strength ring chain flash butt welding technology and the research status of ring chain welding defects and quality control were analyzed. The development direction of high strength ring chain weldingwas predicted.