Aiming at the distributed design and storage of topic map of domain ontology in abundance latent repetition,and redundancy in meanings and structures during merging process,a topic map merging algorithm(TMMC) based on common knowledge thesauri combined with corpus, is proposed,where the similarity of Chinese concepts in merging process is evaluated,then the hyponyms,part-of and other relations between concepts,are dealt with,and HowNet and the other thesauri are used to compose a multi-level similarity calc...