In　order　to　understand　the　mechanism　of　dust　aerosol　influence　on　regional　climate　change,　it　is　crucial　to　quantify　the　radiative　forcing　effect　of　dust　aerosols.　However,　studies　on　the　direct　radiative　forcing　of　dust　aerosols　over　long　time　series　in　China　are　still　lacking.　The　direct　radiative　forcing　effect　of　dust　aerosols　in　China　over　the　past　20　years　was　simulated　and　evaluated　based　on　the　WRF-Chem　(Weather　Research　and　Forecasting　model　coupled　to　Chemistry)　model　in　conjunction　with　remote　sensing　satellites　and　ground-based　observations.　The　results　showed　that　dust　aerosols　exhibited　an　obvious　inter-annual　positive　radiative　forcing　effect　(about　0.38　W　m(-2))　on　net　radiation　at　the　top　of　the　atmosphere,　mainly　in　northwest　China　and　the　North　China　Plain,　while　at　the　atmosphere　dust　aerosols　presented　negative　radiative　forcing　effects　on　shortwave　radiation　and　positive　effects　on　longwave　radiation,　with　a　value　of　1.54　W　m(-2)　of　net　radiative　forcing,　showing　a　warming　effect.　Dust　aerosols　have　a　net　radiative　forcing　value　of　-1.16　W　m(-2)　at　the　surface,　indicating　a　cooling　effect,　with　a　positive　forcing　effect　on　longwave　radiation　and　a　negative　forcing　effect　on　shortwave　radiation,　both　of　which　coincide　with　the　geographical　distribution　of　dust　aerosol　concentrations.　In　terms　of　inter-monthly　variations,　at　both　the　atmosphere　and　top　of　the　atmosphere,　the　dust　aerosols　net　radiative　forcing　values　showed　an　increasing　trend,　with　March　(-0.20　W　m(-2)　and　0.68　W　m(-2))　＜　April　(0.48　W　m(-2)　and　1.44　W　m(-2))　＜　May　(0.94　W　m(-2)　and　2.42　W　m(-2)).　Meanwhile,　at　the　surface,　the　dust　aerosols　net　radiative　forcing　values　displayed　a　decreasing　trend,　with　March　(-0.88　W　m(-2))　＞　April　(-0.96　W　m(-2))　＞　May　(-1.48　W　m(-2)).