In the past two years, the new mode of sharing economy represented by shared bicycles has grown rapidly,accelerating the penetration of various fields of production and life. However, since June 2017, many shared bicyclecompanies have closed down, and a large number of user deposits cannot be refunded.At the end of 2018, the small yellow car of ofo was in a difficult position, resulting in a difficult deposit refund of 10 million users, which triggered a strong social problem of deposits in the shared economy. attention. In fact, the deposit model has been widely used by many shared economic formats for a long time such as shared bicycles, shared cars, and short-term rentals. However, at present, there are no applicable laws and regulations on deposit management in China, and there is no clear competent department, resulting in the lack of supervision.