In order to solve the problems of insufficient information interaction ability, low efficiency of production management and low degree of visualization in most machining workshops, an automatic and flexible CNC machining unit management and control system with four machine tools as the processing core was designed and implemented based on OPC UA data interaction technology and virtual monitoring technology. Unity3D software is used to build a real-time monitoring module of the unit, and communication technology and flexible scheduling technology are used to enhance the digitalization and automation capabilities of the machining unit. The results show that the system improves the ability of machining unit management and scheduling, solves the problem of low information display and interaction, and promotes the improvement of workshop processing efficiency.