Abstract: Daily temperature in Poyang Lake basin was simulated by using high-resolution regional climate model（CCLM），observed daily temperature of the baseline period（1961-2000）was compared with simulated data during same period，and the projection data from 2011 to 2050 was analyzed.The results showed that CCLM simulated the temporal-spatial distribution of T Mean，T Max and T Min at the levels of annual，monthly and daily.In general，simulation data was larger than the observation data，and deviation was relative low in the northeastern and southern of the basin and high in north and central region.But CCLM model simulated the low temperature region in northeast and northwest of Poyang Lake basin T Mean，T Max and T Min will be showed rising tendency in coming 40 years in Poyang Lake basin under A1B scenario Max increasing annual temperature will be found in 2040s.The max increasing T Mean and T Max found in January and T Min in August with monthly level，and max increasing annual T Max found in the east region and annual T Min in the northwest region with daily scale respectively.The results could provide a reference to climate change impact assessment and quantitative adaptation measures in Poyang Lake basin.

Key words: Regional climate model, CCLM, Poyang Lake basin, Temperature