Abstract: A gravimetric method,namely using hydrochloric acid to dissolve barium fluoride to determine its barium and fluoride contents was studied and put forward.Melting barium fluoride sample with potassium carbonate to make its components convert into barium carbonate and potassium fluoride.After leaching and filtering,filtrate was analyzed to get fluoride content and then it will be converted into the content of barium fluoride.Dissolve precipitate with hydrochloric acid and add sulfuric acid to form barium sulfate precipitation.Barium content can be obtained after incineration,and then it will be converted into the content of barium fluoride.Experiment showed that the method′s principle is reliable and analytical procedures are simple,especially for the unidentified samples,its precision and accuracy are better.  