Now more and more commercial banks are involved in microfinance in foreign countries.The construction of inclusive finance system needs the function of big commercial bank in China,but the model that big commercial banks took part in microfinance directly did not bring out good effect.This article seeks a new model that big commercial bank undertakes microfinance based on the development of microfinance in China,studies the mechanism that facilitates the cooperation between big commercial bank and microfinance institution,proposes some basic premises...