Based　on　the　characteristic　of　random　distribution　of　initial　deviation,　an　initial　defect　probabilistic　method　is　proposed　in　the　paper,　which　is　suitable　for　the　integral　stability　analysis　of　suspend-dome　structure.　The　reasonable　value　and　distribution　type　of　initial　geometrical　defect　are　obtained.　The　influence　on　the　nonlinear　integral　stability　of　suspend-dome　because　of　the　position　deviation　of　joint　and　the　initial　eccentricity　of　members　by　construction　is　considered.　The　integral　stability　parameters　are　lower　than　those　of　eigenvalue　method　by　30%.　The　influence　regularity　of　the　value　and　distribution　type　of　defects　on　integral　stability　is　obtained　through　sensitivity　analysis.　This　indicates　that　the　initial　defect　probabilistic　method　can　fully　disclose　the　impact　regularity　of　initial　defects　on　the　integral　stability　of　suspend-dome　structure,　the　distribution　and　value　of　initial　defects　are　more　reasonable,　and　integral　stability　coefficient　is　inclined　to　be　safe.　The　integral　stability　coefficient　is　more　reliable.　The　probabilistic　method　has　been　successfully　used　in　the　integral　stability　analysis　of　suspend-dome　of　the　badminton　gymnasium　for　2008　Olympic　Games,　which　verifies　the　applicability　of　this　method　through　model　test.