The characteristics of life history of rotifer Brachionua calycifflorus collected respectively from Cake Tingtang in Wuhu City and Lake Liwan in Guangzhou City in winter, which was cultured at three statuses of temperatures(10℃,15℃ and 20℃)with 3. 0 × 10⁶ cells/ml of alga Scenedesmus o6liquus.their food, was studied by of life-table demography. The results showed that, at 10℃ all the life-table demographic parameters of Wuhu population, except for the intrinsic rate of population growth, were larger than those of Guangzhou population. At 15℃,only the generation time and the proportion of sexual offspring of Wuhu popu-lation larger than those of Guangchou population. At 20℃,both the generation time and the proportion of sexual offspring of Wuhu population were larger than those of Guangzhou population, but the were also true for the gross reproductive rate, the net reproductive rate and the intrinsic rate of population growth. With the rise of temperature, the life expectancy at hatching, the generation time and the lifespan of the two geographic populations of B. Caiflorus decreased, and the intrinsic rate of popu-lation increased, but the rates of decrease or increase were different between the two geographic populations. The gross reproductive rate and the net reproductive rate of Wuhu population both not significantly affected the temperatures. However, the gross reproductive rate of Guang'rltou population gradually increased with increasing temperature, and the net reproductive rates at 20℃ and 15℃similar and higher than that at 10℃. The proportion of sexual offspring of Wuhu population at 10℃ higher than that 20℃.but both of them similar to that at 15℃. The proportion of sexual offspring of Guangihou population increased with increasing temperature. The dierences in the intrinsic rate of population growth between the two geographic populations might be attributed to their long them might result from-term adaptation to the annually temperatures, but that in the proportion of sexual apring between their long-term adaptation to the seasonal variations of temperatures in their aquatic habitats.