Alpine　wetland　has　strong　grazing　disturbance,　which　is　the　main　cause　of　ecosystem　degradation.　The　spatial　pattern　of　wetland　vegetation　biomass　can　not　only　reflect　the　role　of　natural　factors,　but　also　reflect　the　main　characteristics　of　human　activities　such　as　regional　grazing.　So　it　is　often　used　as　the　main　measurement　method　to　characterize　the　pattern　of　grazing　disturbance.　However,　the　factors　affecting　vegetation　biomass　caused　by　scale　effect　differ　greatly　at　different　spatial　scales.　Especially　for　fine⁃scale　alpine　wetlands　with　an　area　ranging　from　tens　to　hundreds　of　km2,　the　characteristics　of　the　combined　effects　of　natural　factors　and　human　disturbance　such　as　grazing　on　the　above⁃ground　vegetation　biomass　are　still　unclear,　and　there　is　a　lack　of　reasonable　evaluation　model　for　this　type　of　wetland.　This　study　took　Napahai　wetland,　a　Ramsar　site　in　northwestern　Yunnan,　as　an　example,　and　characterized　its　grazing　disturbance　pattern　through　the　spatial　heterogeneity　characteristics　of　above⁃ground　vegetation　biomass　under　the　condition　of　excluding　other　human　disturbances.　We　also　proposed　an　evaluation　model　of　grazing　pattern　in　fine⁃scale　alpine　wetlands　based　on　this　case.　The　study　attempted　to　obtain　the　aboveground　biomass　of　potential　vegetation　based　on　a　detailed　ground　vegetation　survey　and　to　obtain　the　actual　aboveground　biomass　of　vegetation　by　using　a　high⁃resolution　quantitative　remote　sensing　method　(French　PLEIADES　satellite　data　combined　with　measured　vegetation　aboveground　biomass　modeling)　during　the　same　period　of　investigation.　Then　we　used　the　spatial　heterogeneity　characteristic　of　the　difference　between　potential　and　actual　vegetation　above⁃ground　biomass　to　represent　the　Napahai　wetland　grazing　disturbance　patterns.　The　evaluation　model　can　effectively　reduce　the　dependence　on　fine⁃scale　wetland　grazing　interference　data,　and　reduce　the　randomness　of　spatial　distribution　caused　by　large　livestock　such　as　cattle,　sheep,　and　horses.　The　results　showed　that　the　grazing　disturbance　seriously　affected　the　aboveground　biomass　of　wetland　vegetation,　and　the　impact　ratio　was　about　93.5%.　The　study　also　found　that　the　natural　factors　such　as　hydrology　and　anthropogenic　disturbances　such　as　grazing　determine　the　upper　and　lower　limits　of　above⁃ground　biomass　of　vegetation　in　Napahai　Wetland,　respectively,　and　put　forward　four　aspects　of　interference　control　strategies　based　on　the　research　results.　©　2024　Science　Press.　All　rights　reserved.