本文提出一种新的基于Arnold 图像置乱和ＤＷＴ相结合的数字水印安全算法。先将水印图像置乱，然后用基于小波域的算法按一定规则把水印信息分散嵌入到数字产品中。经实验验证，它能够抵抗常见的各种攻击，不可见性和鲁棒性都得到了提高。关键字:Arnold 置乱;离散小波变换;水印分散嵌入Abstract:It is represented that a new digital watermark algorithm based on Arnold image-scrambling and DWT.The watermark information is scrambled firstly and then embedded into the digital images in distribution with a certain method in wavelet domain.In the experiment,it is proved that kinds of attacks could be fighted back and it has a better imperceptibility and stabilization.Key words: Arnold scrambling;DWT;Dispersedly-Watermark-embedded