A total of 188 specimens of Clupisoma sinensis were collected from down-stream area of Lancang River during the period from 2009 to 2010. The age discrimination and growth characteristics of C.sinensis were studied by four determination materials, otoliths, pectoral-fins, vertebra and opercula, the otoliths is the best one in age determination.The age structure of C.sinensis is aged into 6 age groups and fishes with age 1 to 4 year olds form the major proportion of the 188 specimens.New annual ring is formed before May each year.The body length and otolith radius show a relation of liner function.The relationship between body length and weight of the C.sinensis is also expressed by power function where the exponent was close to 3. Growth of C.sinensis is with constant speed style which was described with Von Bertalanffy equation.Fullness of C.sinensis increases gradually with age and reaches peak in 3 years old.The reproductive season of C.sinensis was April to August.