Since the economic crisis of 2009, under the background of substantial increase of the global unemployment rate, small and medium enterprises (SME) play an important role in providing employment opportunities and accelerating economic recovery. The development of SME attracts the attention of the world, and the funding gap is an even more urgent problem to be solved for all the countries. This paper analyzes the types of SEM financing channel through the comparison of financing history of developed and developing countries, and proposes some suggestions to solve the SME financing problem.