Non-point　source　pollution　has　become　an　important　source　of　pollution　affecting　the　water　environment　of　drinking　water　sources　in　recent　years　due　to　its　wide　distribution,　complex　production　process　and　difficult　prevention　and　control.　This　paper　carried　out　remote　sensing　identification　and　evaluation　analysis　of　non-point　source　pollution　risk　based　on　“source-sink”　landscape　in　Chitian　Reservoir.　Firstly,　high-resolution　remote　sensing　image　was　used　to　extract　different　types　of　landscape　distribution　information　of　water　source.　Then,　combined　with　the　promotion/　blocking　effect　of　“source-sink”　on　pollution,　considering　the　distance　from　the　river　and　slope　factor　affecting　the　migration　of　pollutants,　the　non-point　source　pollution　risk　index　was　used　to　calculate　the　risk　of　non-point　source　pollution.　And　we　analyzed　the　influence　of　spatial　distribution　of　water　source　landscape　on　non-point　source　pollution　based　on　Lorenz　curve.　The　results　showed　that　the　risk　of　non-point　source　pollution　was　low,　and　the　sub-watershed　dominated　by　“sink”　landscape　accounted　for　76.　50%　of　the　whole　area.　The　risk　of　non-point　source　pollution　in　the　basin　was　high　in　the　east　and　low　in　the　west.　The　extremely　high　risk　areas　mainly　distributed　in　the　southeast　of　the　basin,　which　were　dominated　by　“source”　landscape　types　such　as　residential　land　and　construction　land,　accounting　for　1.28%　of　the　overall　regional　area.　And　the　western　region　was　dominated　by　forest　landscape　with　little　pollution　risk.　The　ratio　of　pollution　load　of　“source”　and　“sink”　landscape　based　on　slope　factor　was　greater　than　1,　indicating　that　the　“source”　landscape　had　a　wide　distribution　range　in　the　low-slope　region.　The　landscape　layout　was　more　reasonable　among　slope　elements.　The　pollution　load　ratio　of　“source”　and　“sink”　landscape　based　on　the　factor　of　“distance　from　the　river”　was　2.30,　indicating　that　the　＂“source”＂　landscape　had　a　large　distribution　range　near　the　river　course　and　had　a　great　impact　on　pollution.　Therefore,　the　landscape　pattern　near　the　river　should　be　further　adjusted　to　reduce　the　impact　of　non-point　source　pollution.　The　method　of　“source-sink”　landscape　index　calculation　based　on　remote　sensing　is　a　rapid,　objective　and　effective　method　for　the　identification　and　evaluation　of　non-point　source　pollution.　©　2020　Science　Press.　All　rights　reserved.