Copy-move forgery is a common type of image forgery. Block matching detection often has the problems of low accuracy and high time complexity. In order to improve the accuracy and significantly,and reduce the time complexity,this paper used deep learning characteristics and clustering algorithm for detecting. Firstly,it used the sparse autoencoder to find out the internal laws of the images and trained the weight matrix of the hidden layer which obtained by a large number of sample sets. It obtained the hid...