SF6 has high chemical stability and good insulating performance. Now it has been widely used as the insulating medium in the world. But there will unavoidably be tittle toxin low fluoride and moisture during the manufacture process of SF6,. When the equip is running, because of the function of high-voltage arc, SF6 will also decompose little low fluoride, such as SO2F2, SOF2 and S2F10O, which are virulent, corrosive and harmful to the spare parts of the electrical appliances. F-03 sorbent can get rid of the tittle low fluoride, acidic matters and moisture in SF6, better than the imported product from Japan (F-9) on dust removing speed and deepness etc. It has been proved by field tests that it has no influence on the switching capability of SF6 breakers and it can reduce the poison off to below 1ppm.