Special vehicles are used in different industries and application, that people have requirements for special vehicles design become increasingly. Rational and scientific equipment layout design deside the efficiency of special vehicles directly. Therefore, equipment layout design occupies a large proportion in the overall special vehicles design. With the system analysis method and the related table used in special vehicle equipment layout designs by an example, judging the correlation between the various of elements before the conceptual design,then creating the relationship matrix and the system relationships. According to the correlation and important degree designed equipment layout. Finally, evaluating the various design and verifying the design method in the equipment layout design.