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A set of engraving machine human-computer interaction system based on digital twin is designed, which aims at solving the problems of real-time monitoring, single data presentation and high cost in the application process of engraving machine. Firstly, the SolidWorks software is used to design the 3D twin model matched with the actual engraving machine highly. Then, Simulink simulation is established according to the kinematics model of the actual system and control algorithm is written to control the movement of the 3D twin model to complete the virtual debugging function. Finally, the 3D twin model is combined with the engraving machine, so that the model can complete the equipment status monitoring function according to the real-time data obtained from the actual engraving machine. The experimental results show that the human-computer interaction system of the engraving machine designed in this paper has high real-time and accuracy, can ensure good interactivity and combination of virtual and real, improve the monitoring efficiency effectively, reduce the incidence of failure, and has a wide range of application value in the industrial field.