In the process of the Soviet Union’s disintegration, the collective shift of intellectuals’ideological position is the interweaving result of domestic and foreign forces. The implementation of the “Humani tarianism”reform of the Soviet Communist Party is the entering logic on the shift of Soviet intellectuals’ideological position. The molecular invasion into Soviet core culture from western countries is the on the spot logic on the shift of Soviet intellectuals’ideological position. The ideological and cultural disintegrattion of the whoe society is the inevitable ogic on the shift of Soviet intelectuals' ideological position. the historical lesson of the Soviet Union’s disintegration shows that the intellectuals’betrayal and deviation from the state-dominated ideology may evolve into the spiritual force that divides and demoralizes the society under certain conditions.