Abstract: the flow of virtual resources hided in grain trade is another important allocation form of water resources since 1990, except the allocation form of supply and demand side and of basin redeployment. Using the concept and method of virtual resources, the paper analyzed the virtual land flow of maize on the situation of sending grains from the Nouth to the Sorth and its impact to land resources allocation in China. Results show that the maize sent to the South reached 40 million tons that is equivalent to 5.9~9.5 million hm2 of VF. Being the main area of resources out-flowing , the Northeast China has advantages on resources, so its resources allocation is rational, while the North of China doesn’t have enough advantages, and its resources allocation need to be adjusted. Though the grain transferred can meet the grain demand from the South of China, it put high costs of social economic and ecological cost on resources out-flowing areas. In fact, Tony Allan’s Virtual Resources trade is benefit oriented, so it is necessary to allocate farmland more rationally, and provide subsidy to the farmland flowing-out area, and makeup the lost of farmland, and integrate the farmland and land into a uniform accounting form.

Key words: grain sent from the North to the South, virtual resources, flow, impact