Abstract: In order to enhance the robustness of zero watermarking technology, a new robust zero watermarking algorithm based on integer wavelet transform is proposed.Firstly, the copyright information is preprocessed and the original image is transformed by 2level integer wavelet transform.Secondly, the low frequency sub-band is divided into non-overlapping blocks and a feature matrix is produced by judging the numerical relationship between the mean of each block and low frequency sub-band.Finally, the zero watermarking information is constructed by the feature matrix and the preprocessed copyright information, and then it is registered in intellectual property rights database after preprocessing.Experimental results show that the proposed algorithm has strong robustness against conventional signal processing, scaling and rotation attacks.Compared with similar technologies, it has a superior performance.