Abstract：Sun Yat-sen's rich thought of national reunification derived from the ancient idea of “grand unification”, “harmony” of Confucian culture and the fragmented situation of modern China. Its main contents includes: national unity is the main stream of China's history development; China's unity must be the complete unity; peaceful reunification is the major means, but military force can not be discarded;obstacles of national reunification are feudal warlords and imperialism; utilizing the unification of market and communication to accelerate the progress of national reunification. Sun Yat-sen's thought of national reunification provides a significant enlightenment and reference for present national reunification cause.

Keyword：Sun Yat-sen;thought of national reunification;mainland China and Taiwan;