Objective To explore the individual characteristics of stops’transiton cue and the values for speaker identifica— tion-Methods Mono-syllables composed of six stops and／i、a、u／in female Mandarin were selected for study．The starting and central frequencies of F2 and F3 of vowels were measured for statistical analysis．The lOCi of stops for each speaker are calculated． Results(1)The pattern of transition cues are different among speakers．(2)The discriminating power of speakers for each syl— lable varies：syllable／tu／shows higher discriminating power than other syllables and／kh u／shows the least discrimination rate． (3)F2 values of the three vowels in stop syllables are higher than their zero—initial syllables．The increasing extent of F2 for／i、 a／is greater than／u／．(4)The positions of loci are also different among speakers．Conclusion The power of different syllables for discriminating speakers should be addressed in speaker identification and the velar stop syllable should be avoided．The pattern of stop transition cue and the position of loci are useful acoustical parameters for speaker identification．