Construction　control　is　the　key　technique　for　cable　dome.　During　the　actual　engineering,　however,　it　is　difficult　to　ensure　no　difference　between　the　real　prestress　distribution　and　the　designed　value　due　to　existed　construction　errors.　The　practical　problem　for　cable　dome　construction　is　to　determine　how　much　is　allowable　errors　limit.　To　solve　the　problem,　sensitivity　analysis　of　manufacture　errors　of　bearing　and　cable　length　are　carried　out　in　this　paper.　The　random　errors　are　simulated　by　Monte　Carlo　method.　In　a　numerical　model　of　cable　dome　with　the　diameter　of　62m,　the　sensitivity　of　effect　of　bearing　and　cable　length　manufacture　errors　on　structural　performance　is　analyzed.　Numerical　results　show　that　the　manufacture　errors　of　radial　bearing,　hoop　cable　2,　ridge　cable　3,　diagonal　cable　3　and　hoop　cable　I　should　be　strictly　controlled.　Besides,　the　maximum　allowable　errors　are　proposed　referring　to　the　domestic　existing　specifications.