China's Grain Security warning based on the integration of AHP-GRA

According to the meaning of food security, the index system for China's food security was established and the weight on each index was given by adopting AHP method. This paper made measurement and evaluation on the level of China's food security from 2001 to 2007 by using the AHP-GRA method. The results show that the model which conforms to China's actual situation can be used as a food safety pre-warning monitoring. Finally, the paper gives some effective proposals on how to promote China's Grain Security.