The invention discloses a buffering and 
energy absorbing structure. The buffering and 
energy absorbing structure comprises a housing. The buffering and 
energy absorbing structure is a multi-layer 
metal grid structure or porous bubble structure filled in the housing; the 
metal grid structures or porous bubble structures of adjacent 
layers are lengthways alternatively overlapped in positive and negative poisson ratio; the 
metal grid structure in the positive poisson ratio is composed of a three-dimensional 
honeycomb grid structured formed by array type regular hexagonal pore grids; the 
metal grid structure in the negative poisson ratio is composed of a three-dimensional stretching and expanding grid structure formed by array type concave angle pore grids; the meshes of the porous bubble structure in the positive poisson ratio are of an array type rhombus structure; the meshes of the porous bubble structure in the negative rhombus structure are of an array type four-star shaped structure. Compared with the traditional buffering and energy absorbing structure, the buffering and energy absorbing structure can effectively reduce the 
peak value of the 
impact force, so that the whole energy absorbing process is stable, and as a result, the energy absorbing efficiency of the structure can be increased.