The balsa wood is very light. With unique cell structure, light weight and high strength, it is an ideal material for structural sandwich. The balsa wood sandwich material is a structural sandwich material made of balsa wood cross-section. The product undergoes drying, sterilization, splicing, slicing and surface treatment. Its strength and rigidity far exceed those of various foams, and it is one of the commonly used varieties of core materials for wind turbine blades.