Abstract: Adjusting human facial model is a key step in model-based face synthetic technologies.Adjusting the characteristic region of facial wire frame model in detail is important to the fidelity of obtained virtual human face.So，a method to adjust the characteristic region in detail automatically is proposed in this paper.First，the convex hull points of the characteristic region such as eyes，mouth etc. are confirmed，and，the integral contour points are obtained by fitting the curve.Then，the coordinate of the contour and the corresponding points of the adapted facial model are transformed to a new coordinate.At last，the model is adjusted in the new coordinate to get a good adaptation between the human facial model and human face image by revising the corresponding detail data in the model.The experimental results show its validity in improving the model adaptation in detail.