There are five influential social ideological trends active in the cyberspace currently —— anarchism trend,populist trend,the new left trend,nationalism and the new liberalism.Those trends are turbulent and active online,mainly showing following characteristics:content heterogenization;problems realization;intention politicization;trends in fusion,eg.To strengthen the mainstream ideology,keep the social ideological trend in cyberspace harmony,we need to strengthen marxist theory construction and propaganda,solid the mainstream ideology foundation.Set a special web site to research different trends and absorb the essence.Strengthen communication with different thoughts,avoid aphasia in the cyberspace.Cultivating high-quality ideology network work team to guide different thought;pay more attention on understanding public opinion and solving reality problems. <<