Abstract: The EEG coherence reveals information exchanges among the EEG signals which are elicited in different brain areas, it can be used to explore the communication pattern of functional networks in different cognitive processes. The present paper firstly introduces the principles of the method, and then reviews the application of the EEG coherence analysis in language comprehension studies at word processing level and sentence processing level. We present the experiment results at word level from the aspects of common cognitive process, grammar process and semantic process, and sentence level from the aspect of semantic integration. Finally we indicate the advantages and disadvantages of EEG coherence methods, in the meanwhile the directions for future research are prospected

Key words: EEG (Electroencephalography) signal, EEG coherence analysis, spectrum, wave band, language comprehension