本文利用 Bertrand双垄断寡头价格竞争模型 ,分析了我国贸易自由化对外国进口商品与国内同类商品 Nash均衡价格的影响。本文发现 ,与国内流行观点不同 ,尽管我国加入 WTO时国内外商品的价格差距可能因进口关税降低而有所缩小 ,但是随着入世后国内商品替代外国商品的能力有可能减弱 ,国内外商品的价格差距反而因此扩大。 This paper uses Bertrand’s dual monopolistic price competition model to analyze the impact of China’s trade liberalization on the Nash equilibrium prices of foreign and domestic similar goods. This article finds that, unlike China’s popular viewpoints, although China’s accession to the WTO, the price gap between domestic and foreign goods may be reduced due to the reduction of import tariffs, but with the accession to WTO, the ability of domestic goods to replace foreign goods may be weakened, Instead, the price gap has widened.