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A method which will improve the training efficiency is proposed in this paper with the help of speech recognition technology due to the features of naval vessel command system. In the first place, the linguistic features of vessel command instruction are analyzed. And then the relevant problems about continuous Chinese speech recognition are studied on the basis of Sphinx platform, which includes the training of acoustic model, the one of language model, the engine of speech recognition, and so forth. Based on the analyses a non-specific, moderate special Chinese vocabulary continuous speech recognition system is designed and finally comes into being. Experiments use a certain amount of numbers and specialized vocabulary, The results indicate that the system has a high recognition rate after the training of acoustic model.The method of this paper has important guidance for improving the automatic level of the system. 