After clustering of the documents, in the process of retrieval, we make a comparison between the retrieval words the users point out and cluster center of the documents, and as a result, achieve a cluster that is most similar to retrieval words . through the calculation of both the selected documents and those retrieval words, thence the retrieval range will be reduced, the efficiency of retrieval be increased, and the retrieval deviation be overcome to a certain extent 对文档进行了聚类,在检索的期间,对用户提出的检索词先进行和每一类的类心比较,得到与之最近的类别,仅将属于该类别中的文档与用户提出的检索词进行运算,从而缩小了检索的范围,提高了检索的效率,也在一定程度上克服了检索结果的偏差。