This　study　used　IBI(index-based　build-up　index)　to　extract　built-up　land　information　from　Landsat　time-series　images　of　the　year　2003,　2009　and　2016.　Based　on　the　result　of　IBI　and　the　characteristics　of　between　urban　area　and　rural　area,　an　algorithm　of　connected　areas　was　used　to　extract　Huaibei＇s　urban　built-up　area.　Spatial　metrics　were　applied　to　quantify　the　spatial　area,　direction　and　morphology　of　urban　expansion.　Results　showed　that　during　the　13-year　period,　the　urban　built-up　area　had　increased　57.　83　km　2　,　which　was　105.　4%　more　than　the　area　in　2003.　The　direction　of　urban　expansion　were　mainly　distributed　in　the　east,　west　and　south　parts　of　urban　built-up　area.　Splitting　urban　builtup　area　into　two　revealed　that　the　morphology　of　urban　builtup　area　expansion　tended　to　be　more　compact　in　center　zone　and　the　remaining　peripheral　zone　tended　to　be　less　compact.　Socio-economic　data　showed　that　Huaibei＇　s　urban　built-up　area　expansion　was　closely　related　to　the　growth　of　the　city＇　s　secondary　industries　and　investment.　At　the　same　time,　this　study　also　revealed　that　the　other　mainly　driving　forces　causing　urban　expansion　included　the　topographical　environment,　the　guidance　of　policy　and　the　development　of　traffic　systems.　©　2018　Wuhan　University.　All　rights　reserved.