In　this　work,　the　adsorption　desulfurization　performance　and　adsorption　diffusion　study　of　B2O3　modified　Ag-CeOx/TiO2-SiO2　adsorbent　were　investigated.　The　adsorption　desulfurization　performance　was　studied　by　batch　and　fixed　bed　tests.　The　homogeneous　surface　diffusion　model　(HSDM)　was　employed　to　investigate　the　adsorption　and　diffusion　behavior　of　4,6-dimethyldibenzothiophene　(4,6-DMDBT)　in　diesel.　It　was　found　that　the　addition　of　B2O3　promotes　the　dispersion　of　CeOx　species　and　then　further　facilitates　the　dispersion　and　oxidation　of　Ag　species　resulting　in　higher　adsorption　desulfurization　activity.　Ag　species　are　in　state　of　Ag,　Ag2O　and　Ag2O2,　among　which,　Ag2O　and　Ag2O2　are　found　to　be　the　active　centers.　The　kinetics　of　adsorption　desulfurization　of　model　diesel　fuel　was　investigated　to　provide　guiding　significance　for　the　prediction　of　breakthrough　curves　of　fixed-bed　adsorption　columns.　The　batch　kinetic　experiment　modeled　by　HSDM　model　indicates　that　surface　diffusion　controls　the　main　rate.　The　surface　diffusion　coefficient　D-s　determined　by　batch　adsorption　experiments　is　independent　of　operation　conditions,　which　can　be　used　to　directly　predict　the　breakthrough　behavior　in　fixed　bed　adsorption.　The　modified　HSDM　model　is　proposed　to　describe　the　breakthrough　behavior.　Results　indicate　that　the　breakthrough　time　is　affected　by　bed　height,　flowrate　and　influent　concentration.