Building agricultural product closed supply chain is the effective way to ensure food security.Based on the existing research,the paper elaborated thinking of agricultural product closed supply chain in Chang-Zhu-Tan regional,put forward agricul-tural product supply chain design elements,and devised core enterprise model of agricultural products supply chain,i.e.production model,processing model,distribution model and retail model.Research results will play very good exemplary role for the establishment of Hunan ...