In this paper we have systematically introduced the pattern of market share-the pattern that deals with the international competitiveness of export commodity. And by this pattern we have made a study of the long-term trend of the international competitiveness of China's agricultural products (ICOCHAP) as a whole. This study indicates that ICOCHAP has showed a downward tendency, which however is screened by the growth of China's absolute export value. And the main factors to restrict the growth of ICOCHAP ar...