Abstract: The laser engraving machine takes Arduino MCU as the core, and according to the characteristics of Arduino MCU and PC, the overall planning of the design is carried out. The interface circuit based on Arduino MCU and the reconfigurable CNC system located in the upper computer are designed. The upper and lower machines of the control system adopt open, modular and integrated design methods, and set up software structure modules such as simulation module, data module, decoding module and communication module, and make a simple description of the processing of image files. A small CNC engraving machine numerical control test bench was developed to carry out actual machining test on the designed laser engraving machine.