Grain supply for Beijing and Tianjin from final phase of the Qing Dynasty to the Minguo Period had had great changes , the major methods about grain supply had changed from state s control into market s regulation, and the Two City s economic relationship had changed.

Agricultural structural adjustment is a core instrument in China s policy on agriculture,as a result of the adjustment,cultivated land transfer is an important cause of grain supply decreasing in China.

The assay,focusing on the modes and ways of supply chain management which are applied to the study of agricultural products circulation and contributes to the construction of grain supply chain suitable for the nation’s current situation,has significant importance to decreasing logistic cost and the enhancing the efficiency of grain circulation.

The author points out that the government must adjust grain administrative system,exercise the management and control function on the basis of grain supply chain.