To　solve　the　difficult　problem　of　construction　analysis　for　cable　dome,　the　method　of　nonlinear　time-varying　mechanics　is　adopted　to　analyze　the　construction　process　of　cable　dome　in　this　paper.　The　structural　characteristics　in　every　construction　stage　are　analyzed　by　time-varying　mechanics,　and　the　variations　of　internal　force　and　displacements　are　obtained,　the　paper　reaches　a　conclusion　that　it　is　not　safe　to　design　if　the　time　varying　effect　is　not　considered　in　the　construction　process　analysis.　At　last,　advices　on　design　and　construction　of　cable　dome　are　made.