In the light of the high iron and impurity contents in molten zinc, poor fluidness and particles and fold on workpiece often occurred in hot galvanizing plants, our company has organized the famous specialists an- d scientific and technological personnel in many disciplines at home and has developed XY-XG-3 type pur- ifying agent for molten zinc, a high and new technical product. It has effectively solved the difficult problem and filled in the gap in this field at home. Through testing and using, the agent reached the anticipated re- sults and is well received by customers. At present the product is applying for a patent.