Since the 18th National Congress of the Communist Party of China (CPC), with the help of state policies, the new types of agricultural businesses have been flourishing. As one of the important forces of new types of agricultural businesses, the farmer's specialized cooperatives grow up rapidly in the development of the rural economy because of their characteristics which are consistent with the current rural economy. financial management is the core of the operation of farmer cooperatives, which directly affects the long-term sustainable development of cooperatives. Through the survey and analysis of the financial management of many farmers' cooperatives in Wei County, Hebei Province, this paper puts forward the deficiencies in the existing financial management of cooperatives. It also brings some reasonable suggestions to regulate and improve the financial management of cooperatives, in order to enhance the market competitiveness of farmers' cooperatives and realize better sustainable development of farmers' cooperatives.