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.