【正文】 The modern design method of the project of machinery product and deveolp trend Abstract:Under the current domestic and foreign scholars for mechanical design product design at the main thinking, product program design methods into a system, modular structure, the characteristics of knowledgebased products and intelligent four types. That the four methods and the characteristics of the anic interlinkages, product design efforts Computer direction Key words:mechanical products。 Program design。 Trend INTRODUCTION The rapid scientific and technological development, product performance requirements of the growing number and plexity of increased life expectancy shortened. updating speed. However, the design of the products, especially machinery products in the design means, it appears powerless, lags behind the needs of the times. At present, puteraided product design drawings, design, manufacture and production planning has been the subject of extensive and indepth research and has achieved initial success, and the early stage of product development of puteraided design program is far from meeting the design requirements. To this end, the author reading a lot of literature on the basis of summary of the design and scholars at home and abroad program design methods used in and discussed the various methods of anic link between the product and machinery design puter trend of development. Under the current domestic and foreign scholars for mechanical design product design methodology used in the main feature, The program will be of modern design methods summarized as the following four categories. 1． Systematic Design Systematic design of the main features : design as by a number of design elements of a system, Each element is independence between the various elements of an anic link, and is layered, all bining elements of the design, system design can be realized for the task Systematic design in the 1970s by a German scholar Professor Pahl and Beitz. They system theory as a basis to formulate a general model designed to promote the design of rational should have. German Engineers Association in the design on the basis of formulate standards VDI2221 technology systems and product development design methods. The mechanical product design process model, basically adopted the German standards VDI2221 the design. In addition, Many scholars in China in product design program design and also quoted from other developed systematic design, which is representative ： (1) The user needs functional characteristics as a product concept, design and structure of parts design, process planning, operational control of the foundation, and the macroproduct development process, the use of quality function deployment, System users will demand information reasonably and efficiently converted to the various stages of product development objectives of the technical and operational control in order (2) The level of anisms as products of life, and the help of lifesupport systems theory, the product design process can be divided successfully demand levels, realize the concept of functional requirements and the level of product design level. While using the System icon lives abstract expression products to the functional requirements, and form functional product structure. (3) The mechanical design of science into two basic questions : First, to design the products as a system and to determine the best ponents (modules) and their mutual relations。 Second, the process of product design as a system, based on the design goals, correctly, reasonably ascertain all aspects of design work and the various design stage. As each of the designers to study issues and consider the perspective of the different emphasis program used in the design of the specific research methods, there are also differences. Below introduced some representative systematic design methods. Design Element Method Used five design elements (functions, effects, effects vector elements and the surface shape parameters) described product solution think of a product design of the five elements value is determined, all the characteristics of the products and eigen value already identified. My design scholars also used a similar method to describe the product39。s original understanding. graphical modeling method Developed an analysis and design guidance system KALEIT， with a clear level of graphic description of the product structure and th