To study the radiative effect of dust aerosols on synoptic－scale system and the dust transport, an interactive weather-dust model including shortwave radiative effect of dust aerosols is developed. The change of temperature caused by radiative effect of dust aerosols is on-line fed back to the weather model. A dust storm caused by the cold front occurring in the south of Xinjiang during the period of 11 to 16 March 2006 is analyzed with the model. Two parallel simulations are done, one including the radiative effects of dust aerosols (RAD) and the other without it (CTL). A comparison of the two tests showed that: 1) Incorporation of radiative effect of dust can well improve simulations of diurnal changes of surface temperature, vertical changes of air temperature and variation of the sea level pressure during the high floating dust period. 2) During the dust storm period, the radiative effect of dust aerosols can cause large increases in dominant wind speeds at lower model levels but will reduce dust emissions and deposition. 3) A combination of the radiative effect of dust and the basin terrain influences leads to decreasing more deposition of dust aerosols than emission, therefore, it helps maintain the floating dust weather.