CAD of hydraulic manifold block (HMB) is important content of CAD technology of hydraulic system. For the question that how to use HMB to acquire the optimizing scenario of layout and hole, HMB based on MDT has been developed by Dalian university of technology hydraulic staff room. Above the research, this paper researches and implements 2D layout auto- building in optimizing design system of HMB.The work includes the fellow content.in this paper.First, from the database of optimizing result, using the info...