PDF417二维条码具有信息采集速度快、携带信息容量大、可靠性高、纠错能力强等特点,已被广泛地应用到世界近百个国家的证件管理中。本文在分析PDF417二维条码技术特点、相关标准以及在出入境证件中的具体应用基础上,研究了其在证件应用中的防伪性能与识别情况,并为提升证件信息的安全性,提出了利用数字水印与二维条码技术相结合的出入境证件防伪系统设计构想。 PDF417 2D barcode has the characteristics of fast information collection, large carrying capacity, high reliability and strong error correction capability. It has been widely applied to the document management of nearly one hundred countries in the world. This paper analyzes the PDF417 two-dimensional bar code technology features, related standards and the specific application in the entry and exit documents on the basis of its security applications in the document identification and identification, and to enhance the security of document information, the use of Design Idea of ​​Anti - counterfeiting System for Entry - exit Documents Combining Digital Watermarking and Two - dimensional Bar Code Technology.