The export of agricultural products from the United States to Taiwan has given a great pressure on agricultural and rural developments in Taiwan. This paper begins with an analysis of the characteristics and the trend of agricultural trade pressure from U.S. to Taiwan, then presenting Taiwan farmers' movement for reacting the pressure. A further discussion will extend to the impact of U. S. Agricultural product exports on Taiwan's farming pattern and farmers' living conditions. In the final part of the paper, a theoretical concept on limits of a cross-nation interdependence and a policy implementation on agricultural protectionism will be argued.