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. The wire arc additive manufacturing technology began in 1980s, which has the advantages of high forming efficiency, high utilization rate of raw materials and simple equipment. At present, the wire arc additive manufacturing technology of Ti-6Al-4V alloy has been widely studied and some progresses have been achieved. This paper reviews the development history and research hotspots of wire arc additive manufacturing technology, and summarizes its latest research and application at home and abroad. The microstructure, mechanical properties and control technology Ti-6Al-4V alloy produced by wire arc additive manufacturing are summarized and prospected.