This paper begins with various indices of trade liberalization, selects international trade dependent ratio as study object, and analyzes the relationship between trade openness and China's economic growth since 1990 by virtue of econometric methods as cointegration test and Granger causality test. This paper finds that there is a long-run equilibrium between international trade dependent ratio, export dependent ratio, import dependent ratio and economic growth, and there is a single-direction causality bet...