In order to solve the problem of the local dent on sheet part caused by concentration of the underdraught points of the extrusion tool during the NC incremental forming,a method was studied for the generation of the contour forming path that the underdraught points of the extrusion tool uniformly distributed along the contour of sheet part based on the commercial software of UG.The forming effect of the forming path with the dispersed underdraught points was analyzed through numerical simulation and actual forming experiment.The results show that this method can solve the problem of the local dent on sheet part and improve the forming quality. 