00kVsupertension worksystem andrealizingthe“onestrongandthreeexcellent”strategicobjectiveofStateGrid.Therefore,toconstructthepractical trainingbaseforlive-lineworkingin500kVline,andbyusingthetrainingbase,toresearchthenewtechnology,new method,newmaterialsandnewprocessofthe500kVlive-lineoverhauling,topopularizethe500kVlive-lineoverhaul technology,andfurthertoenhancethetheoreticallevelandoperatingskillofthemaintainer,theseareofimportant practicalsigni?cancesforpromotingthedevelopmentofthe500kVlive-lineworkingandforenhancingthereliability andthestabilityofthe500kVlineoperation.Inaddition,theconstructionofthe500kVlive-lineworkingtraining umulateabundanttechnicalandpracticalexperiencesforfuturelive-lineworkingin750kV,±800kVand 1000kVline. Keywords:500kVline;live-lineworking;practicaltrainingbase