To uphold ideology security is to better agglomerate the consensus and to persevere and consolidate the ideology of the socialism with Chinese characteristics.Since the Eighteenth Central Committee of CPC,Communist Party of China conducts the consolidation of the socialist ideology around the multiple logics such as internal and external conditions,association factors,method and guidance as well as opinion boundary of mainstream ideology security construction,determines the position in the guide for strategic position,basic direction,internal guidelines and ideological opinions,clarifies the extreme importance of ideological work by setting up benchmark and by mastering the emphasis,reforms the contents and methods for ideological work,guides the reform deepening in the field of the ideology,analyzes and reasonably guides“three problems”,and divides“three zones”in ideological opinion field,which have powerfully maintained mainstream ideology security and which make the basic status of Marxism in ideological field in 21 st century more vivid.