The behavi or that large-scale retail enterprises unreasonably charge the slotting fees and rebates to the suppliers causes the conflict intensified. The illegality and regulation of this action has al ways been academically controversial . In the identification of large-scale retail enterprises' market position, the traditional unilateral market model can no longer make a clear distinction bet ween an enterprise of domi nance position and that of advantage . By introducing the two-sided market model into the field of antitrust , the abuse of the advantage position for large retailers can be identified within this new perspective and theoretical frame work . In the two-sided market , enterprises gain their advantage position by the customers' dependence , and can be iudged as abusing the advantage position if imposing unreasonably slotting fees . As for China , legislations should be improved and supervision should be strengt hened, especially in the anti-trust legislation and practice , in order to regulate the new arising economic situation and problems as far as possible.