【正文】 ural developing countries, especially near urban areas, the supply of vegetables, generally using this type of supply type of food supply type of food supply chains are generally applicable to food and agricultural production and sales of land to the far distance, consumer demand quite different perishable agricultural products, agricultural producers can not sell their products directly, through intermediaries to provide the necessary services, such as thirdparty logistics, agricultural processors and wholesalers provide appropriate type of supply chain, upstream gathered more producers, and in the middle part of a better understanding of the origin of production, but also in the sales channels to occupy a certain advantage, but fewer , Tfood supply chain and many growers, brokers and sellers and less downstream and concentrated, showing the shape of the supply chain for the dumbbellshaped pared to the food supply chain, which chain is longer, the sales performance of food and agricultural products and valueadded services for the indirect type of food supply chains more mon in China, China39。s agriculture industry in less developed regions, due to lack of upstream farmers to connect one end, other end of the link sales market, specializing in the processing of agricultural products among leading enterprises and the corresponding part of agricultural production often out of line with market , Tmiddle part of the food supply chain as a low level of absence and logistics operation, prone to upstream farmers and downstream production of agricultural products sold blindly difficult ．symmetric food supply the emergence of new sales formats, distribution channels are increasingly largescale professional marketw and supermarket monopoly, the traditional sales of agricultural products and food forms have been replaced by supermarkets, and this trend is more and more obvious, and because of its technological level of agricultural products production also tends to intensive management by a few Ahe by the Royal Thai supermarket fresh food supply chain management survey found that 50% of Bangkok39。s food and agricultural products in large supermarkets(such as 711, Royal Ahe, Carrefour, Sainsburry and TESCO)sold large supermarkets in order to meet the market for agricultural products, quality consistency and supply stability requirements, the supplier of a rigorous , the implementation of the Royal Ahe supermarket fresh food supply chain management, will be vendors from the original 250 was reduced to about 60, so that the logistics system more efficient and the upper reaches of the sharp drop in the number of suppliers of agricultural products and the continuous expansion of the supermarket chain, this food supply chain, upstream suppliers and downstream number of supermarket chains showed symmetrical growth development in developed and more mature cities, this has been expressed in the food supply chain, centralized purchasing, reduce nonuniform flow distribution and valueadded logistics sectors, in order to achieve cost savings of lean logistics ．mixed food supply consumer demand for food and agricultural products market diversification, the proportion of food and agricultural processing has gradually to the statistics that the United States in 2002 raw and processed vegetables for 15% and 85%。fruit of 30% and 70%.Other countries also generally the supermarkets in order to meet consumer demand significant changes to the original by an independent enterprise engaged in specialized production of valueadded aspects of “internal” andw specifically the establishment of largescale processing and distribution center for agricultural products for cleaning, sorting, indepth processing, packaging and distribution and other valueadded services, through the implementation of HACCP in a large processing center and GMP certification process quality and health and safety, to ensure the quality of food and agricultural link is above three does not have the food supply chain, which is large supermarkets and chain stores to respond quickly to market demands upstream suppliers to enhance the strength and advantages of the processing center part of the function, such as cleaning, sorting and depth of processing and other sectors Youxiang supplier back, making the processing center focused on the processing of agricultural products and expanding the number and type of , this food supply chain is a prehensive, multispecies, multifrequency highvolume and mix of supply chain food supply chain are more concerned about customer satisfaction, through the processing centers to respond quickly to market demand, and realtime on agricultural products and foodstuffs “tailored” and depth of processing, in order to achieve different from the lean agile logistics logistics supply chain tracking and food quality and safety In recent years, the focus of the food supply chain collaboration to ensure delivery of quality from the gradual move to reinforce the quality and safety of food and agricultural products, such as BSE, foot and mouth disease and the emergence of genetically modified products and food quality and safety of track without food supply chain management, so based on quality and safety of the food supply chain to track the food supply chain management has bee important and by the United States and other fresh produce, meat products，w cereals and oilseed rape, and survey findings, three by the food supply chain tracking, food quality and safety in that there are great analysis of these differences, they also found that three agricultural products mon food supply chain management, that there are three driving is also the corporate implementation of the food supply chain management requires analysis examines the question: 1．will help differentiate the marketing of food and agricultural products to improve food and agricultural those small or can not be directly found in food quality and