Abstract: Separation of tungsten and molybdenum in production process of ammonium paratungstate is an important working procedure,but this is always one of difficult technical problems.General flows of various ammonium paratungstate technologies and the basic nature of molybdenum were summarized.Moreover,advantages and disadvantages of each separation method for tungsten and molybdenum in production process of ammonium paratungstate were systematically analyzed.Analysis results indicated that there are many advantages,such as short process flow,small tungsten loss,good molybdenum eliminating effect,simplicity of operation,low environmental pollution,and economy feasibility to eliminate molybdenum by using ion-exchange method.It is precisely because of these advantages,ion-exchange method to eliminate molybdenum has a very good industrial application prospect.