Ti-6Al-4V titanium alloy has the characteristics of low density, stable structure and high strength at high temperature. It is widely used in the manufacturing of key parts of aviation industry such as wing beam, landing gear support rib and so on. The research of arc fuse additive technology began in 1980s, which has the advantages of high forming efficiency, high utilization rate of raw materials and simple equipment. At present, the technology of Ti-6Al-4V alloy arc fuse additive has been widely studied and some achievements have been achieved. This paper summarizes the research and application of Ti-6Al-4V alloy arc fuse additive technology at home and abroad, and analyzes the microstructure, mechanical properties and control technology of the titanium alloy after processing. Finally, in view of the current bottleneck of the process, the research direction is prospected.