Abstract: China’s design of constitution system has accumulated rich experience after a century of hard work and frustration,and has achieved a relative sense of progress.It has required the principles of basic constitutional system standard.That China lacks the constitutional tradition and lacks of social foundation which did not produce social stratification led to a long period of constitutional government which is regarded as national construction tools,and it intensely conflicted with Western jurisprudence.The author traces the reason why China today has not realized the Western sense of the constitutional government.

Key words: constitutional government, separation of powers；social improvement