Abstract: The stratified water intake is an important engineering measure to improve the adverse effects of low-temperature water discharged from reservoirs in domestic area. In order to clarify the attenuation effect of stoplog gate in cascade reservoir utilized river section, the influence of the upstream reservoirs on the downstream under the condition of cascade-combined operation in 4 cascade reservoirs of Jinsha River were investigated by using the laterally averaged 2D reservoir water temperature model. The results demonstrated that low temperature water discharging from Wudongde Reservoir did not be effectively prevent by stoplog gate, which was on the contrary of Baihetan Reservoir. The impact that the stratification water intake at Baihetan pose to the low temperature water discharged from Xiluodu and Xiangjiaba, was slightly weakened, and the discharging temperature from Xiluodu to Xiangjiaba in April and May can be increased by 0.8℃ and 1.0℃ respectively. Moreover, the stoplog gate in Wudongde Reservoir played little effect on improving the discharge temperature of Xiluodu and Xiangjiaba. Under cascade development, The stratified water intake measures should be implemented as far as possible on reservoirs with strong regulation capacity.