Abstract: From the Fourth Plenary Session of the Thirteenth Central Committee of CPC to the Sixteenth Party Congress, the third generation of collective leading collective with Jiang Ze-min as it's core, upholding the theoretical innovation spirits of Marxism and combining Chinese history and reality, has made contribution to the innovation and development of the system of multi-party cooperation from the aspects of theory, system and practice. And this has laid a solid foundation for us to go on upholding and developing the political party system in the new century.