Through the people-oriented model of business management，the combination of Chinese and Western and the updated，international and diversified operation，the overseas Chinese in Southeast Asia accounting for 6% of the total population in Southeast Asia，not only formed a greater economic soft power，its comprehensive economic strength had reached a level of moderate regional power. From the study of overseas Chinese’s political participation in Singapore，Malaysia，Indonesia，Vietnam，Thailand and other countries，their economic strength were good for the improvement of political and social status，and had some kind of influence on the local society. In the nearly 30 year’s development of friendly relations between China and Southeast Asia，the overseas Chinese had made a remarkable contribution to it.