Based on Porter’s international competitiveness theories,this paper empirically analyzes dynamic evolution and its influencing factors of international competitiveness of citrus industry from 1992 to 2011 in China with the help of principal component analysis(PCA) and multiple linear regression model(MLRM).The result shows that there are 3 different stages related to the international competitiveness of citrus industry in China.The first stage is before the financial crisis in Asia (1997).The second stage is from financial crisis in Asia to China’s entering WTO.The third stage is from 2004 when the project of citrus industry was formally carried out to the present period.The research demonstrates that international market environment,domestic macro-industrial policy and micro-economic condition result in the fluctuation of international competitiveness of China’s citrus industry.Therefore,it is urgent to construct the quality tracing system and emergency warning mechanism,develop scale operation and further carry out the project of citrus industry so that international competitiveness of China’s citrus industry can be enhanced from both microcosmic and macroscopic points.