This paper presents a novel feature based mesh model representation to represent the missing high level information of the traditional 3D mesh model. The application value of this representation is demonstrated by employing it in the model manipulation approach. Its feature structure, which consists of feature line, feature patch and feature group, is designed to describe the shape, constraint and semantic information of the model. As a result, it constructs a hyper-mesh beyond the original mesh model. With the topology and constraint information between features, the model can maintain its shape and structure properties during the editing. Meanwhile, as the modifications are limited in the local area, the manipulation approach is more efficient.