Abstract: A novel chaotic digital anti-counterfeiting technology is proposed and improved based on chaotic cryptography, ordering to resolve the long-term technical problems.A new chaotic encryption algorithm is studied to generate commodity security codes and verification codes, and a new type of checking algorithm of "two-way authentication" is proposed which can provide many ways to search and multiple query verification, so as to form and optimize an anti-counterfeiting mechanism of "two codes, two-way authentication".Then a comprehensive digital anti-counterfeiting system is constructed to realize intelligent identification, which provides not only site identification but also checking by phone, short message and network (Internet or WAP) .It is proved that the proposed technology is effective and reliable.