In water pollution control planning based on total waste load,it is usually necessary to check the total maximum allowa-ble load and choose proper countermeasures to finish the load cut task under specified water quality objectives.With the route anal-ysis method,the continuous control variables in the direct algorithm are discretized,so not only the optimization problem is simpli-fied,but also the result is more practicable and pertinent.Take the Lake Dianchi Catchment as an example,the 6 water pollution control measures were discretized by parameters and the most suitable pollution control schemes were selected under different water quality scenarios with route analysis method.Afterwards,based on the historical and present treatment situation in the study area, the medium-scenario and corresponding countermeasures were suggested for the 12^th Five-Year Water Pollution Control Planning in the Dianchi Cactchment.