The policy of restricting the use of cultivated land cannot fully offset the potential benefits created by the upgrading of food consumption patterns，so the problem of “non-agriculturalization” and “non-graining” of cultivated land remains prominent. A diversified food supply system is part of a new direction of agricultural supply-side reform under the integration of cultivated land utilization priorities. Under the premise of ensuring food security，the construction of a diversified food supply system requires the government to implement market-oriented methods to encourage food production and circulation units to adjust their production and management decisions. In particular，it is necessary to reduce the production costs of uncultivated land resources，the information costs of food circulation and import trade，and the institutional costs of food supply policies. The construction of a diversified food supply system faces a number of challenges including the limited space for the overall planning of food crops，cash crops and feed crops，a yet-to-be improved environment for developing forestry，livestock and fisheries，the insufficient utilization of the advantages of different food production modes，a low efficiency of food circulation channels，and the oligopoly pattern of soybean imports. Finally，this report proposes a number of policy recommendations，namely，to optimize farmland use control and improve comprehensive food production capacity to coordinate agricultural cultivation，to reduce the marginal costs of forestry，animal husbandry and fishery production on non-arable land，to formulate differentiated programs for the integration of primary，secondary and tertiary industries，to promote the development of data service industries in the food circulation sector，and to optimize the international supply chain pattern of soybeans.