Abstract: The construction process of management information system (MIS) is a systematic organization change process of enterprises. Its essence is to apply information technology to reconstructing enterprises to achieve “transformation” and “innovation” of organization. In agricultural machinery enterprises, a traditional industry, carrying out MIS is an effective method to accelerate management innovation and enhance comprehensive competitive ability. This paper evaluated the MIS results of key enterprises in agricultural machinery industry by combining effectiveness and ordering into a new concept, and put forward a combinatorial analysis method. This analysis will provide foundation for analyzing the utilization situation of MIS and further formulating reasonable reform program in agricultural machinery enterprises.