Abstract: By using the strong acid resolution, such as the hydrochloric acid (HCl) and the nitric acid (HNO₃), relating with molybdic acid radical (MoO₄) to produce precipitates of the molybdate precipitates, and reacting with (CH₃COO)₂Pb to produce the precipitates of tungstenic acid (WO₄), the arsenic acid radical (AsO₄), the phosphoric acid radical (PO₄), the vanadic acid radical (VO₃), the chromic acid radical (CrO₄) and so on. By means of the controlling of the acidity, the medium, the precipitation condition, with lead acetate Pb (CH₃COO)₂ precipitations methods, mensurating the content of molybdenum (Mo) in the molybdenum ore, we obtain the good analysis result.