Abstract: A new matching method based on logircentered paragraphs was introduced. The method built on the basis of the concept dictionary carried out the cluster analysis of the paragraphs which have the same meaning in the text by analyzing the logical concept of the text to be classified so as to get a logical level, and established the logical paragraph concept on the basis of the division method of the logical level, then measured the contribution of different paragraphs to the text theme according to the logical paragraph. At the same time, in order to solve problem of synonyms and polysemy in the matching process, the expansion of the synonyms concept and related words were introduced. Experimental results show that this method can obtain a higher accuracy rate in content flitting, improving the effectiveness of classification effectively.

Key words: Concept, Paragraphs, Text classification, Concept dictionary