Since the foundation of Communist Party of China, for over 90 years, generations of the Party's leadership have carried on the arduous exploration of the party's construction, and formed valuable thoughts. This article connects the party's construction thought of the fourth generation leadership with the practice of Chinese revolution, construction, and reform, dividing the party's construction thought into three parts: that in the period of revolutionary wars; that in the period of socialist economic construction,and that in the period of full opening and reform. Besides, in the historical evolution of party building thought. Currently, we need to strengthen and improve CPC's construction thought from faith construction and system construction.