Macroeconomic environment assessment for overseas iron ore investment based on matter element model

China has an increasing demand for iron ore resource with the rapid development of the economy and the steel industry,so developing overseas iron ore is badly needed.It has an important significance to evaluate the macroeconomic environment for overseas iron ore development.Firstly,the paper determined the countries which would be evaluated;secondly,identified the main factors influencing the macroeconomic environment,established an assessment index system and determined the weight of each index by the Delphi method;thirdly,built a matter element evaluation model,established the sutra field and controlled field,and then calculated out the relating degree of the model;finally,classified the macroeconomic environment for the 14countries,which showed the evaluation results are very well.