Abstract: Sinibrama taeniatus (Nichols) is an endemic fish in the upper Yangtze River, and distribute in Sichuan Province and Chongqing City, China. At present, duo to the loss of habitat after the completion of the Three Gorge Project, and Xiangjiaba Dam Project, and other hydroelectricity project, is was forecasted that the population seizes of the endemic fish (S. taeniatus ) might decreased sharply in the future. So , this paper deals with the reproductive biology of S. taeniatus. 570 specimens were collected during March 2013 to January 2014 from Minjiang River of Meishan city , the first-order tributary of the Yangtze River. The results showed that the main spawning season of S. Taeeniatus population took place from April to May. The minimus size of mature female was 70 mm in length and 7.1 g in weight, while that of mature of the male was 65 mm and 4.5 g.in weight. The sex-ratio of males and females was 1:1.56 (χ2, P < 0.01) in the population. The population included 4 age-groups and most of them matured an 1-year-old. The gonadosomatic index (GIS) began to increase in March, and wit reached to the peak in May. On the contrary, fullniss decreased to the lowest in the same time. The egg dameter distribution in the ovary was unimodal at mature stage indication that the fish was a total spawner. The absolute fecundity of the mature females varied from 301 to 8789 eggs, with an average of (2734±258) eggs. And the relative fecundity to body weight varied from 15 to 1003 eggs per gram, with and average of (236±20) eggs per gram. The absolute fecundity for the mature females increased with body length, body weight, but the indexes of the both were not obvious.