Abstract: Accurate detection for the start and end point of syllable is a very important step in Chinese continuous speech recognition.Traditional endpoint detection methods achieve high rate of success in non-continuous speech，but fall in continuous speech.In this paper，a new method based on MFCC0 and the formant energy of Chinese vowels is proposed，which can accurately detect the start and end point of syllable.The results of experiments show that this method achieve high rate of success even in low SNR.