The reason why this dissertation come out is to test whether the Improved Mel-frequency cepstral coefficients (IMFCCs) can also run out good result on English words. The Improved Mel-frequency cepstral coefficients is mentioned by the thesis Key technology research of speaker-independent speech recognition by author Yaqiang Gu. In the article, they use the Chinese words as the training and testing data and proved that Improved Mel-frequency cepstral coefficients have better recognition rate than general Mel-frequency cepstral coefficients (MFCC).