【正文】 ter opening up the world market, China could give up part of the production according to the principle of parative advantage. Also China could use the international markets and resources and the relatively cheap imported grain to make up the gap between China39。s agricultural products in the international market. China has actively introduced foreign investment to speed up the agriculture change from traditional agriculture to modern agriculture, implemented a virtuous cycle of agricultural production and the liberalization of agricultural products to achieve domestic food security in the global market. International Market ShareAfter the Uruguay Round, as many countries reduced agricultural protection level and increased market access, China seized the opportunity to expand exports of agricultural products. According to WTO Secretariat estimated that in the Uruguay Round negotiations, the developed countries, tariff cut of 37% or more. Tax rate reductions in most agricultural products were fresh flowers, plants, vegetables, oilseeds, grains, representing a reduction of 40% or more, the tax rate cuts for agricultural products were the smallest dairy products, sugar, animals and other products, a reduction of 32% or less. Tariff concessions to developing countries in the Uruguay Round established the basic 24% target. At the same time, all members of the party in the amount of market access (tariff quota volume) there was also increased significantly. Tariff quotas of wheat increased by 807,000 tons, an increase of million tons of rice, maize increased million tons, dairy products increased by 729 thousand tons. This expanded the petitive ability of China39。s agricultural trade system and reduced the rentseeking” behavior in the existing agricultural trade system, and maintained the transparency and predictability of agricultural trading system, provided stable legal environment for the development of agricultural trade. Negative ImpactsLike a doubleedged sword, entry to the WTO also brought some negative impacts on China39。s protective policies on domestic farm products began to be phased out, foreign farm products at lower prices were set to pose great challenges to their Chinese counterparts. So the structure of Chinese agricultural production faced great shock (Yu Xiao 2002). Obstacle of Environmental BarriersGreen barrier was a kind of protection model in international trade，which was generally adopted in developed countries and strengthened constantly in the international trade. The green barrier decreased the export volume and export ine of the agricultural products in our country. It was reported that in early 2002, European had terminated the imports of honey from China on the ground of the honey containing excessive chloramphenicol. In January, 2002, the frozen peeled shrimp in Zhoushan city of Zhejiang was returned by European. In February, the export of agricultural modities including frozen chicken, peanuts and vegetables in Shandong Province was dropped dramatically. During the period of January to May, European announced to prohibit the exporting of animal products and seafood from China. It was estimated that from January to August, 2002 the damage had reached 10 billion, due to the foreign technical barriers, especially environmental barriers, which had caused direct and indirect losses of China39。s agriculture technology to help the country engage in free international trade of agricultural products? Under such circumstances, to develop China’s import and export of agricultural products should adhere to grasp the production process, adjust the agricultural production structure, reform the production management mode. On the other hand, China should grasp the foreign trade links, formulate the export preferential policies, establish environmental barrier system, and learn to antidumping. In particular, some measures must be taken to cope with the import and export of agricultural products after entry to the WTO. The following major points should be included. Adjusting the Structure of Agricultural Products According to the rules of market economy, China should make full use of the two resources in the world market, adjust the structure of agricultural products and optimize the allocation of resources, which was an important measure to reduce the impact on WTO. The key of adjustment was to adapt the demand in the changing market and implement “seed projects” to optimize the mix of crops, animal products and aquatic products. China should adjust and optimize the regional pattern of agricultural production. In the eastern coastal area, the production of grain and other agricultural products should be reduced, as the region lacked of parative advantage. While high valueadded and exportoriented should be developed. In the western area, land for farming should be returned to forestry and grassland to improve the ecological environment. In the central area, as the staple agricultural products had parative advantage, so the production cost should be reduced on the basis of productive capacity. In a word, China should bring the regional parative advantage into full play, and develop special wheat, rice, soybean and corn, and various fruits. China should try to satisfy domestic demand for highend products by promoting the production of organic foods, green foods, pollutionfree agricultural products, and other ecofriendly agricultural products. Also China should develop highgrade aquatic products actively and set up fund to pensate for the loss of ine, which caused by agricultural sector. And the fund should be used for agricultural restructuring, developing high quality and efficient farming, animal husbandry and agricultural product processing industry. It could be seen that, with the implementation of the strategic adjustment of agricultural structure, the development of China’s agriculture has entered a new stage. Industrializing the Operation of Agricult