Abstract: On the basis of macroeconomy of China, the paper deals with the methods of mathematics economic model-its construction, development and application. In addition to the establishment of the model for money demand forecast and supply control. The author probes into the principles of the model's mathematic nature, structure decomposing and police implication simulation and work out all the algorithms and computer software concerned. All the achivement above can serve as a powerful auxiliary tool for the decision making of the macroeconomy of pur country.