Dust　aerosols　significantly　impact　climate,　human　health,　and　ecosystems,　but　how　land　cover　changes　(LCC)　influence　dust　concentrations　remains　unclear.　Here,　we　applied　the　Weather　Research　and　Forecasting　model　coupled　with　Chemistry　(WRF-Chem)　to　assess　the　effects　of　LCC　on　dust　aerosol　concentrations　from　2000　to　2020　in　northern　China.　Based　on　land　cover　data　derived　from　multi-source　satellite　remote　sensing　data,　we　conducted　two　simulation　scenarios:　one　incorporating　actual　annual　LCC　and　another　assuming　static　land　cover　since　2000.　Results　revealed　that　approximately　293,300　km2　of　land　underwent　conversion　over　the　past　20　years.　LCC　generally　resulted　in　an　average　annual　reduction　of　5.70　mu　g　kg-1　(micrograms　per　kilogram　of　dry　air)　in　dust　aerosol　concentrations.　The　most　significant　reduction　occurred　in　winter,　averaging　8.90　mu　g　kg-1,　followed　by　spring　(8.06　mu　g　kg-1),　autumn　(5.27　mu　g　kg-1),　and　summer　(1.06　mu　g　kg-1).　Converting　bare　land　to　forestland　was　most　effective　in　reducing　dust　concentrations,　followed　by　conversions　to　grassland　and　built-up　areas.　Conversely,　conversions　to　bare　land　increased　dust　aerosol　concentrations,　especially　when　forestland　or　cultivated　land　was　transformed　into　bare　land.　These　results　emphasize　the　importance　of　targeted　land　use　strategies　to　mitigate　the　adverse　environmental　and　health　effects　of　dust　aerosols.