The invention discloses a nanophase ceramic heat-insulation window membrane which is of a composite structure. The nanophase ceramic heat-insulation window membrane comprises a wear-resistant layer (1), a base membrane layer (2), a nanophase ceramic heat-insulation adhesive layer (3), a function membrane layer (4), a pressure sensitive adhesive layer (5) and a protection membrane layer (6), and the layers are composited into a whole; the wear-resistant layer (1) is combined on one surface of the base membrane layer (2) through ultraviolet light polymerization; the nanophase ceramic heat-insulation adhesive layer (3) is combined on the other surface of the base membrane layer (2) through thermocuring; one surface of the function membrane layer (4) is composited on the outer surface of the nanophase ceramic heat-insulation adhesive layer (3); the pressure sensitive adhesive layer (5) is combined on the other surface of the function membrane layer (4) through thermocuring; the protection membrane layer (6) is composited on the outer surface of the function membrane layer (4). The layers produce a synergistic effect, infrared rays can be selectively blocked, the thermal radiation of sun is blocked in summer to reduce the energy consumption of refrigeration of an air conditioner, and the loss of internal heat is blocked in winter to lower the heating cost, so that the nanophase ceramic heat-insulation window membrane has a green energy-saving effect.