Abstract: A new production technology for barium fluoride and intermediate product barium fluosilicate by using byproduct hydrofluosilicic acid of phosphate fertilizer industry was developed and researched.Development of this technology relieved proenvironment pressure of phosphate fertilizer industry and there was no waste liquor discharged during production process.Cost of production was lower than that of neutralization process of hydrofluoric acid and product quality was better than that of similar products produced by traditional processes.In addition,quality of byproduct white carbon was in accordance with requirment of GB 10571—1989.Application of this technology will bring better social,economic,and proenvironment benefits.<BR>