Abstract: In order to solve the problems of large sediment concentration in irrigation water diversion in the southern Xinjiang of the upper reaches of Tarim River,which seriously affects the normal water supply of irrigation canal system in irrigation area. This paper theoretically modifies and optimizes the calculation method of continuous sedimentation tank on the basis of one-dimensional flow supersaturated sediment transport method,and proposes an improved integrated design method of continuous irrigation sediment discharge basin for sediment laden rivers in arid area. The experimental results show that the relative errors between the calculation results and the experimental results are less than 5%. With the increase in continuous sedimentation tank section,the relative error decreases. With the increase in irrigation diversion flow and sediment concentration,the relative error decreases at first and then increases. Thus it can solve the problem of large error in the calculation method of sedimentation rate of continuous sedimentation tank for water intake and diversion of sediment laden river,eliminate the influence of channel sediment deposition caused by water intake and diversion of sediment laden river,and ensure the water demand for continuous irrigation,and realize irrigation diversion,sediment reduction,sediment prevention and sustainable development in arid areas.