The invention discloses a device for maintaining and cleaning the cutting part of a numerical control machine tool, which comprises an annular shell, a guide rail cavity, a mounting rod, a mounting flange, an arc-shaped sliding table, an L-shaped rod, a cleaning air jet head, an adjusting rod, and a driving motor , Motor spindle, Z-shaped rod, fixed plate, high-pressure air pump, PVC hard pipe, rubber hose, fixed connecting rod and LED light strip. The structure design of the present invention is reasonable, and the guide rail cavity of the ring structure is used as the sliding track of the arc-shaped sliding table. When the arc-shaped sliding table slides inside the guide rail cavity, the 360° no dead angle cleaning of the CNC cutting position is realized, and the daily maintenance of the machine tool is reduced. To reduce the workload, avoid scrap iron chips on the cutting parts of the CNC machine tool during or after cutting, and continue to clean the processing parts during the processing process, effectively avoiding the scrap iron chips falling between the workpiece and the tool, reducing the The risk of scratches on the surface of the workpiece, the ring-shaped LED light strip can provide the operator with a better penetrating vision and eliminate the dead angle of observation.