Abstract: This work investigated honeycomb sandwich structure with mathematical analysis and experimental verification in order that the deformation of the face-sheet and the stress in the honeycomb-core of honeycomb sandwich structure under peeling load can be obtained. The theory of beam on elastic foundation was applied to the sandwich structure. The formula to compute the deformation of the face-sheet and the distribution of stress in the core was given for sandwich structure under peeling load based on model in which the core was regarded as elastics foundation and the face-sheet beam on the foundation. The conclusion was reached that the method suggested by the work to analyze sandwich structure is feasible, with merits of low quantity of computation, high precision and direct formula.