Abstract: In this paper,the dynamic analysis of the carbon fiber honeycomb sandwich structure was deeply investigated. The carbon fiber net plate was equivalent to an orthotropic plate, and the honeycomb core was equivalent to a three-dimensional orthotropic solid based on the principle of work equivalence. In order to prevent some buckling of the structure, it is important to thicken the part of the carbon fiber plate and densify the core of the honeycomb. Using complex structure finite element analysis, the theoretical prediction conforms with the experimental results very well, the equivalent model is reasonable, and the method is correct.