Abstract: The development of Internet leads the Internet new word coming into being. These unknown words are difficult to identify timely and accurately by the current Word Segmentation Method, therefore Internet new word identification method using Immune genetic algorithm was brought forward. This method is based on the analysis of characteristics of Internet new word, using the phenomenon of Chinese words and word groups to extract exemplary antibody, and injecting the antibody targeted during the process of genetic algorithm.The experiment results show that the method not only has a higher recognition rates of the new words consistent with the phenomenon of word groups in word fragments but the result of identifying ordinary Internet new word is adequate.

Key words: Immune genetic algorithm, Word group, Word position, Antibody, Internet new word identification