Abstract: The special action to comprehensively rectify unwanted calls has opened up a new situation in the issue of social co- governance. Facing the identification and judgment difficulties in commercial marketing unwanted calls management, CAICT adopts the design idea of“combination of dredge and block”,learning from the“Do Not Call”mechanism to explore the establishment of National Comprehensive Service Platform for Defense Unwanted calls. The platform not only provides necessary defense for users, but also provides accurate business information for users who have real needs,which is also a practical exploration of unwanted callsmanagement.

Key words: business unwanted calls, combination of dredge and block, donot call, numbermark