The invention belongs to the technical field of buildings, and particularly relates to a green energy-saving building outer wall heat insulation and sound absorption structure and a construction method thereof.The green energy-saving building outer wall heat insulation and sound absorption structure comprises a structure supporting layer, a multi-layer sound absorption material, a heat
insulation layer and an environment-friendly facing layer which are sequentially arranged from inside to outside; the multi-layer sound absorbing material comprises a porous sound absorbing plate and a
honeycomb aluminum plate, and the porous sound absorbing plate is located in front of the
honeycomb aluminum plate; the connecting components are arranged between the structural supporting layer and the porous acoustic panel, four connecting components form a group and are located on the upper side, the lower side, the left side and the right side of the
honeycomb aluminum panel respectively, and every two adjacent connecting components can be connected in a buckled mode. In the
actual use process, external heat is firstly blocked by the heat
insulation layer, the heat
insulation layer reflects and blocks the heat,
heat transfer into a room is reduced, accordingly, the stability of the indoor temperature is kept, the use frequency of equipment such as an air conditioner is reduced, the energy-saving effect is achieved, the conical round holes in the surface of the porous sound absorption plate can effectively reduce sound reflection, and the sound
absorption effect is improved. And meanwhile, the special structure of the honeycomb aluminum plate can reflect and absorb sound.