Abstract: Support decision system(SDS) of the optimum matching of man-machine interface in mechanical systems is made by using the theory of SDS. The multi-dimension adjustable simulator stand for the optimum matching of man-machine interface in mechanical system has been structured with the use of Computer aided design (CAD) technology. This stand is made mainly up of frame, instrument panel, stage surface, pedestal and other components. It is able to simulate the man-machine interface in various mechanical systems. The experiment evaluation for the degree of optimal matching of man-machine interface in mechanical system can be realized by this stand. Method and model databases have been structured with the Analyses of hierarchy process (AHP) and Fuzzy comprehensive evaluation (FCE).According to this system ,the optimization of the initial choices can be well completed for its saving time ,man and source.