Abstract The notions of “freedom” and “democracy” in the democratic system of the west can only be used to mobilize political
participation, but fail to benefit the tasks of political institutionalization and social integration in the
developing countries. This is simply due the fact that these tasks cannot be accomplished by external forces, and the slogans of "freedom" and“democracy” can incite all forces, including the bad ones,to enter the political fighting ground.The more undeveloped,the more anti revolutionary forces. This helps explain why many developing countries tend to sink into disorder. In Mexico, the PRI party, in leading the nation's political and economic reforms, suffered from its increasingly weakening position. The major cause is that the reforms have diverted themselves from the national reality and historical
traditions. But PRI's defeat in the mid term election of July 1997 does not mean the beginning of a “multi party era” following the western model. Political reforms in the developing countries usually start under the pressure from the west. They tend to move tortuously along the western trajectory at first, and then remold themselves on the basis of national reality and historical traditions as so to generate political stability.This is a general law of political development for the developing countries.