Novel metaphor is different from the conventional metaphor.The distinction between novel metaphor and conventional metaphor is not clear-cut but in a degree of metaphoricity.In the situation,when novel metaphors are widely accepted and generally used in daily life,their metaphorical meaning are neglected by people,the metaphorical characters decrease and they become conventional metaphors.The tentative model Blending Relevance Theory(BRT)is an integrated framework of the two theories:Conceptual Blending Theory(CBT)and Relevance Theory(RT),seeking the optimal relevance from the two input spaces.