Focus on the low pass rate and bottleneck of mass production in air film hole machining of aeroengine turbine blade, breakthrough in adaptive machining system, intelligent network control system, equipment network data interface, quick-change tooling and other technologies, based on the lean “U-shaped” layout, an electric discharge machining digital production line for turbine blade air film hole machining was built, which has characteristics of automation, digitalization, integration and intelligence. This line can realize“ 24 h unmanned production” and multi-model collinear mass production. After 2 years of operation, various economic indicators such as the one-time inspection pass rate and the comprehensive efficiency of equipment have reached the leading level in China, which has significantly improved the productivity and pass rate, reduced the cost of blade machining, and the bottleneck of mass production of aero-engine turbine blade was solved. The composition and architecture, key technologies and design process of the digital production line for electric discharge machining are demonstrated, which has important reference value for the construction of the digital production line of the aero-engine manufacturing industry.