In order to realize the efficient forming of difficulty forming surfaces such as vertical wall, the method of multi-stages CNC incremental forming with individuation was proposed based on the surface zoning for the triangular mesh model, and the generation method of the path which needed by each stage forming in the surface zone was studied. A triangular mesh surface zoning approach based on formability was given. Moreover a strategy to generate multi-stage spiral forming tool path for each surface area by offset was presented. The case studies indicated that the proposed method could realize surface zoning and generate smooth and successive multi-stage spiral forming path for the corresponding surface zones.