Abstract: CNC jade carving technology can reduce the labor cost of jade carving industry, improve production efficiency and upgrade the industry. Taking sitting Maitreya buddha as an example, in this paper, the authors use JDPaint5.50 to set different parameters to carve 13 pieces of jadeite with similar texture, and test the relationship between the processing quality, the degree of tool loss and the time-consuming by different tools. The results show that: when the speed is the same, the time consumption of using the flat head cutter for shaping is positively related to the depth, and the time consumption (s) is 142.27 ×depth (mm). When 0.6 mm tapered ball-end cutter is used in the rough jade cutter processing procedure, the maximum safe path space is 0.08 mm, and the percentage of speed is 25%. The time consumption of rough and fine cutting operations is related to the path space and the percentage of speed, and the extent of time consumption reduction decreases with the increase of path space and the percentage of speed. The surface quality of CNC jade carving is mainly related to the taper ball-end cutter head diameter and path space of the fine cutting process, and is independent of the percentage of speed. If the path space of rough cutting process is large, the machining allowance of rough cutting process should be increased to allow the fine cutting process to remove the trace of tool path.