For　the　large-span　suspend-dome　structure,　prestressing　construction　process　is　the　one　where　the　geometric　system　changes　from　mechanism　or　quasi-mechanism　into　structure　system　which　is　capable　of　undertaking　design　load..　The　safety　control　of　this　structure　system　is　different　from　conventional　ones.　It　requires　control　of　the　design　state　namely　the　ultimate　service-state.　Simultaneously　the　structure　mechanical　property　of　the　prestress　tensioning　process　should　be　studied,　and　the　safety　in　the　geometric　forming　process　of　structure　should　be　controlled.　In　this　paper,　the　suspend-dome　of　the　badminton　gymnasium　for　2008　Olympic　Games　is　taken　as　the　research　subject　by　simulating　the　whole　process　of　prestressing　construction　with　two　different　calculation　methods,　analyzing　the　changing　characteristic　of　shape,　internal　force　and　node　displacement,　and　affirming　the　safety　during　the　construction　process.　The　study　indicates　that　the　structural　mechanics　response　by　stepped　entirely　loading　method　is　more　than　that　of　element　birth-death　method.　It　proves　the　practicality　of　stepped　entirely　loading　method　usually　used　in　simulating　analysis　of　engineering　construction　process　and　the　safety　of　stepped　entirely　loading　method　in　suspend-dome　design.　This　paper　may　serve　as　a　good　reference　for　future　practice.