Alloy 718Plus is a recently developed Ni-Fe based superalloy that is capable of maintaining excellent strength, hot working and welding performance up to 704oC (1300oF). In this paper, the development of 718Plus alloy research in China was summarized. It mainly includes four sections. (1) The phase composition and structure of alloy 718plus, (2) The effect of phosphorus on microstructure and mechanical properties of alloy 718Plus, (3) The effect of aluminum on microstructure and mechanical properties of alloy ATI 718Plus, (4) The effect of η-Ni3Al0.5Nb0.5 phase on mechanical properties of alloy ATI 718Plus. Based on above research, we can have an insight into the structure of phases in alloy 718Plus and the mechanism of alloying elements on the alloy 718Plus.