The paper analysed the reasons that the strategy of south to west water transfer has delayed for 15 years and thought that the strategy is facing a chance of great development nowadays.On the one hand,we have found the technical replacement scheme for the west line of 12 billions m3 of water to flush the sand by using the technique of artifical pressure to liquefy solum,to solve the contradictory of water using with west line,and provided the condition of water resources for the south to west water transfer...