In　order　to　compare　performance　of　different　fire　detection　systems　commonly　used　in　urban　utility　tunnel,　several　types　of　fire　detectors　were　selected　to　test　by　setting　up　a　fire　experimental　bench　to　record　the　response　time　of　detectors.　In　the　experiment,　ceramic　tube　electric　heating　and　alcohol　ignition　were　used　to　ignite　the　cable　respectively　so　that　fire　detectors　in　the　cable　tunnel　could　give　an　alarm.　Results　show　that　contact-type　linear　temperature　sensor　has　the　fastest　alarm　time　for　ceramic　tube　electric　heating　method.　The　cable　line-type　rate-of-rise　and　fixed　temperature　detector　are　more　stable,　and　the　alarm　times　are　shorter.　The　image　fire　detector　did　not　give　an　alarm.　As　for　alcohol　ignition　method,　fire　is　relatively　small　in　the　early　stage,　the　temperature　in　the　utility　tunnel　is　relatively　low,　and　the　fire　detection　response　time　would　be　long.　In　addition,　wind　velocity　in　the　utility　tunnel　has　a　great　influence　on　the　detector　alarm　time.　©　2024　The　Authors.