综合运用国际市场占有率(MS)、贸易竞争指数(TC)和显示比较优势指数(RCA)等指标分别从市场份额、净出口状况和出口规模等角度对我国玉米的国际竞争力进行了实证分析。结果表明，入世对我国玉米产业近期影响不大，尤其对我国玉米生产和出口没有明显的影响；我国玉米出口仅具有中度竞争力，并且很不稳定，年度间波动较大；与玉米主要出口国相比，我国玉米的国际竞争力处于中等水平。随着国内玉米加工需求的增加，我国将由玉米出口国向进口国过渡。

This paper used the occupation rate in international market and TC index and RCA index synthesis to analyze the international competitive ability of Chinese maize before and after WTO accession. The results showed that Chinese WTO accession to the recent maize industry has little impact, in particular, Chinese maize production and exports not affected. Chinese maize exports is only moderately competitiveness, and very unstable, inter-annual fluctuations. The country is compared with the main exporters of maize, international competitiveness of our country maize is in medium level. As the domestic maize processing the increased demand, Chinese maize will be transition from exporting country to importing country.

国家自然科学基金对外交流与合作项目(70710107001)