A huge quantity of corrugated containers is used for carrying packaging and storing various products: they are indispensable to our lives. One of the most important properties of corrugated containers is their compressive strength, which depends on the edgewise compressive strength of corrugated fiberboard. In order to raise the edgewise compressive strength without increasing costs and weight, it is necessary to consider the flute shape. In this study, nonlinear structural analysis using finite element method was carried out, then the deformation behaviors of corrugated fiberboard were investigated under the edgewise compression test. Furthermore, the edgewise compressive strength was estimated by a new simulation method which considered the failure of the liner and the medium. Then the optimum flute shape was thoroughly investigated. The results showed that the flute shape with smaller “r” (the radius of curvature in the vicinity of the flute tip), or larger “θ”　(the angle determined by the height of the corrugated fiberboard the wavelength and the length of the flat part) could improve the edgewise compressive strength efficiently．

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