Under the new pattern of comprehensive opening up, transformation of China's foreign economic development mode has entered into a new era. Therefore, on the basis of evaluating the existing achievements, it is very necessary to make a macro analysis on how to accelerate the transformation of China's foreign economic development mode, combining with new requirements in the new era. The comprehensive evaluation about transformation achievements of China's foreign economic development mode is still at an exploratory stage, and related evaluation mainly pays attention to foreign trade. So building a more comprehensive evaluation index system, including foreign investment and financing, international economic cooperation, resource and environment, and then measuring transformation achievements based on the Principal Component Analysis(PCA), can not only find the overall optimization process of China's foreign economic development mode transformation in the past more than 10 years, but also make clear the transformation orientation in the future. In the new pattern of opening up, China, to speed up foreign economic development mode transformation, should adhere to five development concepts, form a linkage mechanism with the transformation of domestic economic development mode, take the global value chain division system as a basis, stick to the general tone of making progress while maintaining stability, focus on the main line of structural reform of supply side, and deal with preferentially the economic and trade relations between China and the United States.