Abstract: Social trend of thoughts reflect the interests and requirements of certain social class or social group,which consist of four general characteristics: reality,mobility,activity and integrity.Because of the special social background,the social ideas in present China has its own particularity,namely,the time-space condense basing on diversity.Hence,its relationship with the mainstream ideology becomes more and more complex.The leading of Social trend of thoughts must depend on the core value system of Socialism;meanwhile,five mechanisms must be upheld.