With the rapid development of internet services

the application problems about domain names solution continue to appear. As the most important Internet based services

the security risks of DNS have become increasingly prominent. The intelligent protection system of DNS security for large scale catastrophic which presented in this paper

can resume the service by the establishment of large-scale disaster database when single or lots of domain names resolution failure. And at the same time

through the analysis of massive data in database

the system establish the automatic discovery and disposal mechanism for suspected attack source

to achieve substantial increase in DNS parsing accuracy

security and complaint handling effi ciency.