Abstract: Based on the in-depth investigation on the manufacturing status of aluminum alloy car body of rail vehicles, taking the standardized production line and beat production station as the research object, and according to the production concept of digitalization and flexibility, this article proposed the overall framework of digital workshop which conforms to the manufacturing characteristics of rail vehicle and the production business process of aluminum alloy car body, described the key technologies of digital product design collaborative platform, digital manufacturing operation management platform, digital flexible production line and big data platform. The digital workshop integrated with research, development, manufacturing and management collaboration can improve production efficiency, reduce operating costs and shorten product development cycle. It can provide reference for aluminum alloy car body workshop and even rail vehicle equipment manufacturing enterprises to further promote intelligent manufacturing.