Under the impact of the financial crisis in 2008, some foreign trade enterprises suffered heavy losses while some others were not defeated, in such background, combining the characcteristics and current situations of China's foreign trade enterprises , the paper analyzed why the response of these two kinds of foreign trade enterprises is so different, and worked out that their core competitiveness is different. Intergrating the study of foreign trade enterprises' core competitiveness from in ternal and external scholars, this paper proposed the concepet、characteristics and elements of foreign trade enterprises' core competitiveness, and finally proposed that in "post-crisis era," what foreign trade enterprises can do to cultivate and improve their own core competitiveness ,in order to offer the reference for China 's foreign trade enterprises to improve the internatinal competitiveness ,so that they can react to the challenges in "post-crisis era" better.