Objective To study the finger ridge counts and t triangle on 300 normal people of Bai nationality,and to provide normal parameters for medicine,genetics and anthropology. Methods The ink print of fingerprints and palmar patterns were obtained with informed consent. Results The average value of TFRC was 126.88±32.28,which had a significant difference between males and females(P<0.05),but had no significant difference between left and right hands(P>0.05).Comparing the mean value of FRC on each finger,the order was that:the value of thumb>of ring finger>of index finger>of middle finger>of little finger.And the mean value of each finger had a significant difference between males and females(P<0.05),but had no significant difference between left and right hands(P>0.05).Along with the increasing deviation value of FRC between corresponding fingers,the variety trend of the frequency was gradually reducing,and an overwhelming majority(88.2%) of the value was less than or equal to 3.The frequency distribution of TFRC was close to a normal distribution.The mean value of atd angle was 40.27±4.34 and that of tPD (12.46±4.66)%.Both of atd angle and tPD had a significant difference between males and females(P<0.05),but had no significant difference between left and right hands(P>0.05).The frequency of tPD under 15% was 72.5%,and none was over 30%.Conclusion The distribution of FRC and triangle in corresponding fingers of Bai nationality is symmetric and it shares some common features with that of other ethnic groups with its own char