Based on the analysis of CAE used mesh model, this paper puts forward an algorithm of the characteristics of CAE method mesh features. In view of the design details of the CAD model can be ignored in the CAE analysis of the characteristics of CAD models in this paper, a small fillet, chamfer, roller and other non-structural design features, vector-based Facet iterative filtering method was used to identified and removed. Firstly, identify the characteristics of the region, and then non-characteristic area under the patch normal vector adjustment feature regions vertex normal vector and update the coordinates of the feature reconstruction, the final grid which meets the requirements model of CAE.