Abstract: Partial occlusion has seriously affected to the accuracy of face recognition.A model about automatically partial occlusion reconstruction is proposed.First, the face gray value is used to determine the partial occlusion type, and then a M-estimator is used to estimate the occlusion mask, the best face reconstruction coefficient is found to reconstruction occlusion area and weaken the impact of partial occlusion.The experiments have proved the effectiveness of the partial occlusion treatment, and the significantly improvement of the recognition accuracy.