This paper gives a review on the application of digital fingerprint technology, and the domestic and international research work on this topic. Firstly, it briefly introduces a digital fingerprint system and its application in intelligence protection. And then it introduces the traditional digital fingerprinting technology and the new fingerprint technology based on multi user communication technology. It points out the shortcomings of current digital fingerprinting technology, and proposes that the development direction of digital fingerprint technology in the future is to research anti collusion attack using communication technology perspective as a starting point.