Reform of rural financial systems makes slow progress in China, and it has influenced the development of rural society and economy. Based on summarizing the experiences of past reform of economics systems, the paper insisted that reform logic of rural financial systems should be the same as that of economics systems. It is an inevitable choice of reforming and deepening rural finance to develop rural private finance. The paper also analyses the possibility of the growing in rural private finance, and points out the institutional guarantee of developing rural private finance.