This paper reviews the latest domestic and overseas development progresses in the manufacturing process of terahertz feed horns.The main manufacturing methods currently used by the research institutions and enterprises are classified and expounded， including the precision computer numerical control （CNC） machining， precision electroforming， plate stacking method，and additive manufacturing. The typical results of both domestic and overseas process development progresses are introduced， and the corresponding process advantages and limitations in application are discussed. Based on the application development of the terahertz frequency band and the development trend of the product demand of the terahertz feed horn，the analysis is carried out.And the future development direction of the methods in this field is further proposed.It has important guidance and reference value for the subsequent development and research of structural design and manufacturing process of the terahertz feed horn.