The vigorous development of the medium and small sized enterprises has become the most vibrant part of economic growth. It has been playing an important role in optimizing economic structure, improving the efficiency of market, expanding employment and promoting technical innovations. However, the imperfect financing channels of the small and medium enterprises can have adverse effects on our economy.For the medium and small sized enterprises, credit financing channels is the main financing channels. On the basis of original research, this paper represents the difficulties in the financing process and the fundamenta reason is information asymmetry. Based on the information asymmetry, adverse selection, credit rationing and financial gap, this article also systematically analysed the actual reasons from the aspects of macro environment, the medium and small sized enterprises and financial institutions (commercial banks).Finally, the paper adopts empirical methods and represents some measures to alleviate financial difficulties of the medium and small sized enterprises. These measures include:establishing the financing system which is suitable for the medium and small enterprises, promoting the construction of financing system by enhancing credit system, and the construction of nonbanking financial institutions and the medium and small banks; expediting the innovation of commercial banking categories and credit mode. |