Microcredit has been developing rapidly these years and already become one of the ways of financial services as poverty reduction activities in developing countries. As an important supplement to rural finance, microcredit for the peasants has been gradually developed and improved in China as well as other developing countries. In Shaanxi Province, which is one of the first batches of pilot provinces, microcredit also achieved sufficient development. However, in recent years, microcredit companies are facing the challenge of developing sustainably. Based on this background, the paper is to explore the sustainable development model of microcredit companies, and a new model has been proposed to solve the existing problems of its sustainability and innovation.