Consi derati on and sol uti on of several techni calthe South-· to-· North WaterWANG( The South—to—North Water Di versi on Proj ectConstructi onAbstract:In accordance wi th the sci enti fi c andtechnol ogi cal breakthroughsMi ddl e Route of the South—to—North Water Di versi onProj eet,severaland the constructi on of theproj ect,i .e.thesel ecti on of thetypewi thgravi ty fl ow,thecontrol of constructi onsurvey,the furtherder i nternal waterpressurei n soft soi lfoundati on,etc.,are emphati cal l yand the author’ Srethi nki ngson thekeytechni calprobl ems areKey words:the Mi ddl e Routeof the South—to—North Water Di versi onsystem;dam hei ghteni ng;hydraul i ctunnel i n soft soi l foundati on