Aiming at the problems of high price,poor system openness,poor portability of CNC engraving equipment at home and abroad that cannot meet the needs of small and mediumsized customers,a small CNC spindle engraving machine based on GRBL was developed.The overall scheme of the CNC engraver and the design method of each subsystem were introduced.The development of low cost,high efficiency and practical CNC engraving machine was realized,and has friendly operation mode and good engraving effect.