Abstract: A parameterized approach to generating the finite element model of the hexagon honeycomb with node merging is proposed. Firstly, the mathematical formulae are constructed to relate the coordinates of the key points to the geometry parameters of the hexagon honeycomb. To model the honeycomb planes with the same direction, the sequence numbers of the key points are also standardized, by which the topology relationships of the geometry elements in the hexagon honeycomb are defined. Secondly, the top plane and the bottom plane of the hexagon honeycomb are blocked into feature planes to merge nodes with L-side plane and W-side plane. Lastly, through the proposed approach, the finite element models of eight schemes are modeled effectively. The scheme 4 and scheme 8 are feasible ones as the maximum equivalent stress and the maximum deformation are concerned. The scheme 8 is adopted by the spacecraft corporation and the test prototype of multifunctional structure is formed successfully. The proposed approach is effective and suitable for parametric optimization of multifunctional structure.