Abstract: Based on the PCNN（Pulse Coupled Neutral Network） model，propose an image pre-processing method based on Canny algorithm to enhance the blurry edge for image，and strengthen or restrain the capacity of capturing each other for a similar cluster of corresponding neurons.Using the maximal correlative criterion to compute the attenuation threshold，control the capturing intensity each other for neurons，and avoid the excessive smoothing aroused by through capturing for segmentation image，a new image segmentation method is put forward successfully.A good image segmentation result，which shows more image segmentation details and is not influenced easily by neuron parameters compared with other corrective references，is gained using the method.