Abstract: A new bionic lattice structure for the snowboard of ski jumping is designed by referring to the cross-sectional microstructure characteristics of bamboo in nature, and the optimization design is carried out based on the response surface method. The bearing and bending properties of the bionic lattice structure were investigated by numerical simulation of quasi-static compression and three-point bending experiments. The effects of three geometric parameters of bionic lattice structure, such as cell wall thickness, cylindrical structure radius and wall thickness, on its mechanical properties were studied, and the primary and secondary influence analysis method was used to explore the influence of different geometric parameters on mechanical properties. An optimization model with the maximum specific stiffness and specific bending stiffness as the objective and the geometric size of the unit cell as the constraint was established, and the non-dominated sorting genetic algorithm was used to calculate the solution, and the optimal solution of the Pareto front was obtained, The numerical simulation verified that the bending and bearing capacity of the bionic lattice structure were significantly better than the original lattice grid structure in the snowboard and the other two lattice grid structures. The research results were of great significance for the bionic design of the lattice grid structure and the improvement of the overall mechanical properties of the snowboard.