The　effectiveness　of　fireproof　sealing　systems　in　preventing　the　spread　of　fire　in　high-rise　building　cable　shafts　relies　on　the　properties　of　various　sealing　materials　and　the　construction　process.　Therefore,　a　comprehensive　evaluation　is　necessary.　The　authors　of　this　paper　propose　a　comparative　test　method　based　on　an　entity　test　platform　for　a　performance　evaluation　of　cable　shaft　fireproof　sealing　systems　in　high-rise　buildings.　The　test　platform　measures　changes　in　temperature,　humidity,　and　smoke　mass　during　fire　tests　to　compare　the　performance　of　four　sets　of　fireproof　sealing　systems　in　terms　of　thermal　insulation,　smoke　sealing　capacity,　and　overall　integrity.　In　addition,　a　fire　dynamics　simulation　(FDS)　of　fireproof　sealing　systems　was　carried　out　on　the　entity　test　platform,　and　the　sealing　failure　process　in　the　case　of　cracking　in　the　fireproof　sealing　system　was　revealed.　The　simulation　results　for　the　temperature　trends　in　the　lower　space　align　with　the　fire　test　results.　Furthermore,　as　the　gap　size　increases,　the　diffusion　of　smoke　and　flame　accelerates.　Consequently,　the　performance　of　cable　shaft　fireproof　sealing　systems　depends　not　only　on　the　sealing　material　but　also　on　the　construction　process.