Abstract: As one of the most important and also the most difficult problem of Chinese information processing field,word sense disambiguation has not been entirely solved until now. On the basis of our research on HNC representing Chinese knowledge, this article proposed a word sense disambiguating method based on concept relativity. The method combines various features in concepts. The features include hierarchy, network and structure etc. The uniform representation formalizes the features. In this way, the problem of knowledge relationship expression among various concepts will be solved. 20 Chinese polysemous words were tested in our experiment. The result with average precision 87% shows that the method is effective.

Key words: Word sense disambiguation (WSD)，Concept relativity, HNC theory