本文针对现有的二维条码嵌入数字水印算法所存在的水印信息嵌入量不够等问题，提出一种优化的数字水印嵌入二维条码的新方法，实现真正意义上的证件防伪，对二维条码在防伪领域上的应用深度和广度都有很大的提高。-In this paper, the amount of embedded watermark information is embedded digital watermarking algorithm exists enough problems for the existing two-dimensional bar code, proposed an optimized digital watermark embedding new ways dimensional bar code, to achieve a real sense of security certificates, two-dimensional bar code depth and breadth of applications in the field of security has greatly improved.