In the context of the meso-scale dynamic model MM4 and dust-aerosol transportation model in combination, simulation was undertaken of a sandstorm weather event and sand transfer on April 22, 1992. Evidence suggests that gale begind the cold front of Mogolian cyclone was the main factor for raising sand, which went into upper levels due to strong updraft in the frontal zone and diffused downstream mainly with the front moving; genesis and development of Mogolian cyclone was dependent on the strength of southward going cold air, midlatitude frontal zone characteristics and baroclinic instability produced by temperature and pressure distributions.