Abstract: The wave of modern democratization was confronted with too many obstacles in the middle 20th. More and more people have focused on the function of civil society to democratization in the reflection of democratization. The author wants to show the functions of civil society to democratization from three dimensions, such as structure-function, political culture, and globalization:the instinct structure of civil society makes it convenient to depart the burden between citizens and the country, to build the channels of citizens' democratic participation, and to offer the mechanism of controlling power by the society, therefore it can push the process of democratization; Since the citizen culture and democratic culture are united, strengthening the construction of citizen culture is good for producing democratic spirit and culture;with the development of civil society from nation country to global, it may still be an important power to push the democratization of the world.