Abstract: Present situation of ammonium bifluoride′s market and production technology in China was introduced.Latest technologies in recent years were summarized and compared，and advantages and disadvantages thereof were analyzed.At present，the production technology of ‘fluosilicic acid and liquid ammonia’ with liquid phase method has become mature，which not only solved the problem of fluorine pollution of phosphate fertilizer enterprises，but also protected the fluorite resources， opened up a new way for the deep processing of fluoride salt containing ammonia.Whereas，ammonium bifluoride products with the gas phase method，was more suitable for high purity field，and was the developing focus in the future，because of their high purity， low water content，small particle size，big specific surface area，and good water solubility etc..

Key words: ammonium bifluoride, liquid phase method, gas phase method, fluosilicic acid