Abstract: The traditional representative democracy is aggregative. It emphasizes aggregation of voters, preference through voting and the majority principle for public decisions and policies. Such form of democracy has improved the scientificity and rationality of decision making but cannot well solve the problems brought by individual contradictions voters' irrational choice. Further, the contradictions between interest subjects cannot be harmonized effectively, which has brought a great difficulty to the public decision making. The consultative democratic theories appeared in the late 20^th century. It has pointed out the weakness of the aggregative democracy and has made a series of amendments and improvement. In spite of that, it itself exists many problems and hence has received a lot of queries and blames. The post-Marxists with Laclau and Mouffe as representatives put forward a kind of new democracy — pluralistic radical one which attempts to overcome the shortcomings of the above two kinds f democracy, but it also is far from perfectness.