Semi-solid A356aluminum alloy slurry was prepared by a serpentine channel,and the slurry was heated for a short time by an induction heating system and then finally quenched in water to observe effects of short-time electromagnetic heating on temperature and microstructure of the slurry.The results reveal that temperature difference between the inner slurry and periphery slurry can be decreased greatly through short-term induction heating process,reaching the range of±1℃,fulling meeting the requirements of rheo-forming.Meanwhile,primaryα-Al phase becomes more spherical with the coarseness of grain size.Heating power has some effects on microstructure of the slurry when heating power is in range of 1.6～3.6kW,with increasing in heating power,heating time is shortened and primaryα-Al phase is refined.The slurry temperature has also somewhat effects on the slurry microstructure.When the temperature is in range of 595～608℃,with decreasing in temperature,the primaryα-Al phase is refined.