Circular economy adapts to large-scale production,has higher requirement on technical level,and possesses positive externality. Therefore,circular economy requires a lot of financial support. Facing investment and financing problems of circular economy by enterprise,the government should strengthen the regulatory role,increase investment support on circular economy,strengthen the bank’s green credit business,reduce barriers to business loans,diversify financing channels for enterprises,guide social investment’s flow direction,and promote circular economy forming larger scale,thereby providing policy support for building a resource-saving and environment-friendly society.