In order to explore the relationship between the structures of honeycomb and its mechanical performance, eigen buckling and harmonic analysis of FEA software ANSYS were adopted. The results prove that when the edge length keeps constant, the buckling strength decreases quickly with the increasing height, while the resonant frequency rises after an initial decline. The buckling strength of honeycomb drops sharply with the decrease of edge length when the height is fixed, while the resonant frequency changes little with small peaks by the right side, and the resonant frequency fall to the bottom of 88Hz at the length-height ratio of 1:1.