Abstract: In late Qing Dynasty，accompanied the birth of a series of treaty ports in Yunnan province，such as Mengtsz（1889），Szemao（1897），Tengyuen（1902），the development of foreign trade acquired the support from institution and communication.The traditional economic system went to the end and new one was absorbed into global market as the result of the expansion of internal and international trade.The volume of internal and international trade of Yunnan province in 1901 was calculated and the paper got a conclusion of silver 17460000 liang（50 grams）on the basis of copper，tin，opium，cotton yarn，cotton cloth，salt，tea，grain，silk and groceries，which were usually regarded as the representative commodities of middle and long distance trade.