Minimum Living Guarantee System is one of the most important parts of the China’s social assistance system. It plays a crucial role in protecting the basic living rights. It safeguards the social stability and prosperity. However，there isn’t a clear definition or specific implementation details about the Exit Mechanism of Minimum Living Guarantee System （EMMLGS）. Recently，more and more attention has been focused on the difficulties in its practice. It is necessary to clarify what EMMLGS really means. Firstly，this paper describes the constitution，implementation and features of the EMMLGS in Guangzhou. Secondly，it analyzes the challenge to the EMMLGS’s development. Finally，it proposes policy advice for the development of EMMLGS.