Hydraulic manifold block(HMB) schemes are used more and more widely in hydraulic driving and controlling fields. But there are still many shortages in the way of HMB design nowadays. After studying and absorbing the research achievements at home and abroad, based on the previous work, the intelligent optimizing design system's research and development to HMB for board valves is carried on. The paper tries exploring theories and realizations of HMB CAD techniques, solving some problems in design process, and...