According to the analysis of CAD technology and Solid Works software, the design idea and methodology of 3D modeling and parameterized design are put forward based on Solid Works, and the example of shearer drum model is used to introduce the modeling process in detail. The method will shorten the design time，increase the quality of design and provide useful help to quickly design of mechanical product.

A lot of information needs to be processed in the MEMS design process, but this information lack the unified expression format at present. This causes the design stage of MEMS not to be able to share information, furthermore causes low design efficiency. A product information model is presented according to MEMS design stage. XML language is used to describe information of each design stage, and an information exchange and sharing platform model has been established to solve MEMS design data sharing and exchange bottleneck question. The XML technology makes the platform reusable and extensible.

For the complexity and miniaturization of MEMS, MEMS design process is extremely different from general mechanical design process. Commonly the design flow is dominated by “trial-and-error” methods. It is necessary to describe design process of MEMS for reuse. This will help to reduce the number of redesigns and thus decrease the time to market. Based on XML and necessary extensions being made, a MEMS design process description language, called MDPDL, is presented and the syntax and implementation are discussed in detail. The Document Type Definition (DTD) is adopted to define the syntax rules for the tags of MDPDL, considering core activities and related resources of MEMS design process. Finally, an implementation case has been given out to illustrate the efficiency of MDPDL.

For the characteristic of cross-coupled multi-disciplinary research of microcomponent effect plays an important role in the MEMS system. The combination of different effects has the different component principle, then forms the different functional device, completes the different functions. Effect and effect principle modeling of microcomponent in conceptual design for microcomponent are introduced. The effect classification of microcomponent, formal description of effect, the relationship between effect and principle and function decomposing and the mapping between effect and function are described, and the effect model for microcomponent is established. The model is the basis of microcomponent conceptual design solution.