Abstract: As the arsenic in the material can not be removed before it goto the blast furnace, the high arsenic content in the hot metal makes steelmaking process complex and is bad for the steel quality. By controlling the parameters such as arsenic content in total hot metal、hot metal temperature、basicity、top pressure, the arsensic content in hot metal can be reduced hightly, and the hot metal can fit steel making. The research results show that under arsenic content in total hot metal 0.015 %、Si 0.4 %、slag rate 400 kg/t、hot metal temperature 1490 ℃ and top pressure 220 kPa, the largest dearsenization rate in hot metal is 67 % and arsenic content in hot metal is noly 0.007 %.