Abstract: Parametric modeling method of reverse engineering is the important direction.Through the analysis of the current method of reverse parametric modeling,propose the product model design based on reverse modeling elements.Combining function analysis and morphological analysis,used to extract the modeling element and establish a modeling method based on the function-form-parameter model,and introduces the advantages of this modeling method and its general process.At the same time,to reverse the parameterized modeling software Geomagic Design X as a platform,through the typical case of parameterized modeling of medical instruments verifies the advantages of the presented modeling method.For individual medical instrument reverse modeling provides a more effective method of modeling.

Key words: reverse engineering, medical equipment, functional analysis, morphological analysis, modeling elements