As a kind of porous material, the honeycomb structure has the advantages of light weight, high strength, high stiffness, sound insulation, noise reduction, heat insulation and other excellent performance. Therefore, it is widely used in the field of transportation vehicles and aerospace etc. In order to solve the stress concentration problem of honeycombs with straight walls, a honeycomb sandwich plate with circular arc core layer is designed in this paper. The equivalent parameters of honeycomb core are derived based on unit load method and the dynamic model of the curved-wall-core honeycomb sandwich plate is derived. The Chebyshev-Ritz method was used to solve the natural frequencies of honeycomb sandwich plate under cantilever boundaries, and the finite element method is used to compare. The errors of the first five natural frequencies are all within 5% from the two methods. The 3D printing model of the curved-wall honeycomb sandwich plate is prepared to do the sine sweep test, fixed frequency harmonic resides test and impact test, which verify the correctness of the theoretical model. It is found that the curved-wall honeycomb core has a certain impact resistant performance. The obtained research results will provide theoretical support for the application of curved wall honeycombs in vibration and vibrational isolation.