The horizontal milling and boring machine is suitable for processing large and medium-sized parts and box-shaped parts for rough and fine boring, milling and other processes, which can meet the requirements of turning-around processing of large parts. Horizontal milling and boring machine is suitable for box-shaped part hole and plane machining with many processes, turning of outer cylindrical surface, cutting of annular groove in hole, tapping metric and inch threads, etc. which can meet the requirements of rough and fine machining, the horizontal milling and boring machine is a large-scale CNC high-efficiency, precise and general-purpose machining equipment.