The invention provides an energy-saving, low-carbon and heat-insulation composite wallboard, and a production method and production equipment thereof. The energy-saving, low-carbon and heat-insulation composite wallboard is characterized by consisting of two surface boards and a core board arranged between the two surface boards, wherein the core board is prepared from polystyrene foamed plastics, fly ash, cement, sand, admixture and water. The invention also provides the production method and production equipment of the energy-saving, low-carbon and heat-insulation composite wallboard. The energy-saving, low-carbon and heat-insulation composite wallboard has the advantages of light weight, thin body, impact resistance, compression resistance, heat preservation, heat insulation, water proofing, fire proofing, sound insulation, shock proofing, explosion absorption, easy cutting, slotting, no need of plastering, fast dry operation, labor saving and the like.