Abstract: Wire and Arc Additive Manufacturing(WAAM)holds significant potential for advancements in the field of mold repair.This paper introduces the WAAM,discussing its advantages in meeting the needs of mold repair.It summarizes the key technological developments required for mold repair using WAAM,including strategies for controlling forming accuracy,algorithms for three dimensional model layer slicing,and methods for deposition path planning.Finally,based on current trends,the paper forecasts the future developments in the planning,control and automation of monitoring in WAAM process,specifically in the context of mold repair.