Abstract: With the deepening of the industry 4.0, many developed countries have put forward the strategy of re-industrialization, and China has also put forward "China Manufacturing 2025". Global manufacturing will be striding into the era of intelligent manufacturing, and intelligent machine tool line will become the future development trend of machine processing equipment. Based on the status quo of intelligent machine tool line and its relative technologies, researches in home and abroad were introduced, existing problems was put forward in the research of intelligent machine tool line and the definition was given. According to the technical route of intelligent machine tool line, this paper analyzed the characteristics of intelligent technology, intelligent function and intelligent network.