BackgroundThe　objective　of　this　study　was　to　investigate　the　survival　outcomes　of　surgical　margin　width　in　intrahepatic　cholangiocarcinoma　(ICC).MethodsBetween　November　2011　and　August　2017,　patients　who　underwent　hepatectomy　for　ICC　were　collected　from　13　major　hepatopancreatobiliary　centers　in　China.　The　survival　outcomes　for　patients　who　underwent　wide　margin　hepatectomy　(WMH)　were　compared　with　those　who　underwent　narrow　margin　hepatectomy　(NMH)　using　the　1:1　propensity　score　matching　(PSM).ResultsAmong　478　included　patients,　195　(40.8%)　underwent　WMH　whereas　283　(59.2%)　underwent　NMH.　PSM　yielded　79　matched　patients　with　similar　baseline　characteristics.　Patients　underwent　WMH　had　a　significant　better　OS　and　DFS　compared　with　those　underwent　NMH　(before　PSM:　median　OS　27　vs　17months,　P＜0.05;　median　DFS　15　vs　8months,　P=0.001,　after　PSM:　median　OS　41　vs　22months,　p＜0.05;　median　DFS　16　vs　10months,　p＜0.05).　However,　subgroup　analysis　based　on　the　AJCC　staging　system,　WMH　could　only　improve　the　survival　outcomes　in　AJCC　I　ICC　patients　(Stage　I:　OS,　DFS,　P＜0.05).ConclusionsSurgeons　should　strive　to　achieve　a　wide　surgical　margin　for　patients　with　AJCC　I　ICC　to　optimize　the　long-term　outcome.