Investigation of mathematical models of economy with tools of the system ECOMOD The specified ECOMOD system ( computer system supporting mathematical ECOnomical MODels) was created and tested by the authors. The system supports and connects all stages of the process of development and research of mathematical models: construction of a model in a view of the saved experience; check of the model on completeness and self-coordination; equipment of the model with the data etc. Here tools of the control and analysis of a model realized to the present time are described. Some results of the automatic analysis of some rather complex and realistic models of market economy are given.