Abstract:In zinc extraction process,fluorine and chlorine,lecched into the solution, affect the normal operation of electrolysis.Thus the use of zinc oxide dust containing high fluorine and chlorine should be restricted,meanwhile the promotion of the large plate technology which needs high purity of electrolyte is also affected .In the paper,the harm and the behavior of fluorine and chlorine from zinc industry is analyzed.And the main methods for removal of fluorine and chlorine from zinc slid materials and zinc sulfate solution are summarized.Finally,in wet system ,we conclude that copper slag method should be used to remove chlorine ,study of calcium salt combined method should be emphasised to remove fluorine,reaserch of goethite method should be increased to remove fluorine and chlorine.