In order to protect the copyright of digital asset,a digital watermar king technique is proposed where color quick response (QR) code is embedded in colo r image.The watermark is embedded and extracted by contourlet discrete cosine transform singular value di sposition (DCT-SVD) technology,and the watermark is encrypted with Arnold scrambling.Through experimental verification,the algorithm for JPEG com pression attack, cropping attack,Gaussian noise and salt and pepper noise attack has stronger rob ustness.The color QR code can be correctly identified after the attack.The watermark of the color QR code which is extracted from any rotating attack also has a high recognition rate.The watermarking algorithm has good invisibility and robustness,which can be applied to the prot ection of digital copyright.