A study on the reactivities of the various ferrosilicon (Si 25, 40, 75, 85 and 95%) and Al-Si alloy have been carried out.The Si content of ferrosillicon has influence on the reactivities. When the Si content is lower than 50%, it is composed by only Fe-Si intermetallic compounds and has very poor reactivities.Al-Si alloy with low Fe content has the advantage of lowering reaction temperature, but Al-Si-Fe alloy (Al 16.1, Si 40.1 and Fe 43.4%) in not satisfactory.