Study On The Phenomenon Of "Cheap Sale And Expensive Buy" And The Regulation In Chinese Mineral Trade

China is not only a main country producing and consuming mineral products but also an important imports and exports country of mineral products. Since 1990s, especially after entering WTO, the trade behaviors of our mineral products, such as oil and ironstone, put up certain the phenomenon as "cheap sale and expensive buy" in the complexion of the acute fluctuant international market price. Namely, when the price of international market is higher, our country imports more mineral products and when the price of international market is lower, our country imports less mineral products. Then a series of questions are put forward: is the phenomenon as "cheap sale and expensive buy" ubiquitous or exceptional, long existing or short existing? How to explain this phenomenon and how to elude it?Be established in the discussion of this regular, this paper firstly analyses the relationship between price changing and trade quantities minerals in the catalog of customhouse trade. The result is that the phenomenon as "cheap sale and expensive buy" is really ubiquitous. Then analyzes the reason of the phenomenon as "cheap sale and expensive buy" from two facets: the trade beheaviors of market structure and market subject. In the aspect of market structure, there are some laws among the degree of market centralizing, the scope economy and the phenomenon as "cheap sale and expensive buy" , namely, the lower the degree of market centralizing is and the worse the scope economy is, the more obvious the phenomenon as "cheap sale and expensive buy" is. In the aspect of market subject, through the game between govement and trading organizations in the domestic and overseas, it finds that the reasons inducing the phenomenon as "cheap sale and expensive buy" are differences among govement, enterprises' trade goal and trade behavior, the weakness of discourse right in international prices, etc. Based on the upper analysis, puts forward corresponding countermeasures, including the following: optimizes market structure of mineral products, collects risk expenses of foreign trade, perfects trade policies and the service of information guide, builds the reserve mechanism of our country, improves the discourse right in international prices, etc.