Abstract: The paper selects four indexes to measure the economic openness of China, applies co-integration analysis, error-correction model and Granger-test to study the long-term equilibrium relation between the four indexes and GDP growth in China. The result of experienced study indicates that the intertrade dependence degree especially the intertrade dependence degree with US show the tightest relation with GDP growthand the smallest bias with equilibrium station, besides, the other indexes show unilateral granger relation with economic growth except it. The study indicates that the economic openness of China in the period from 1980 to 2002 is still at a low level and puts forward the emphases of opening policy in the future.