Cable　structures　are　widely　used　in　large-span　constructions　due　to　their　flexible　shapes,　high　strength,　and　lightweight.　However,　the　high-temperature　performance　of　cable-clamped　joints　affects　the　overall　fire　resistance　of　cable　structures.　Moreover,　the　galvanized　layer　of　cable　may　melt　at　high　temperatures,　which　decreases　the　anti-slip　capacity.　But,　the　influence　of　the　galvanized　layer　on　the　high-temperature　anti-slip　capacity　has　not　been　studied.　In　this　study,　the　high-temperature　anti-slip　capacity　of　a　commonly　used　type　of　galvanized　cable-clamped　joints　is　investigated　by　various　high-temperature　experiments.　It　is　found　that　the　anti-slip　bearing　capacity　of　the　new　cable-clamped　joint　at　300　degrees　C　is　60.30%,　which　is　lower　than　that　at　the　normal　temperature.　Compared　with　existing　studies,　the　results　at　normal　temperature　are　in　good　agreement　with　the　theoretical　values　obtained　from　literature,　which　validates　the　correctness　of　the　experimental　system.　The　difference　between　the　high-temperature　test　results　and　the　theoretical　formula　calculations　is　significant,　with　the　minimum　difference　reaching　28.5%.　Furthermore,　the　anti-slip　bearing　capacity　of　the　cable-clamp　joint　decreases　as　the　thickness　of　the　zinc　coating　at　high　temperatures.　Therefore,　galvanized　layer　thickness　and　high　temperature　should　be　considered　in　the　assessment　of　the　high-temperature　performance　of　cable　structures.　Compared　with　the　research　conclusions　of　domestic　scholars,　it　can　be　seen　that　the　test　results　in　this　paper　are　more　reliable,　which　can　provide　a　useful　reference　for　the　design　of　cable　structures.