A new digital image watermark algorithm of discrete wavelet transform was proposed to guarantee its robustness and security by combining with association memory ability of Hopfield neural network.First,the 2-level discrete wavelet transform was applied to the digital image,then Hopfield neural network disposed of and got back the extracted watermark repeatedly,so it could improve the extracted watermarking image to strength the robustness of the algorithm.Experimental results showed that this method could an resist against noise adding,JPEG compression,image cut and so on.