The invention relates to a design method of a protection cushion. The method is characterized by comprising a breathable net layer, wherein 3-600 layers of breathable materials are stacked to form the breathable net layer. The problems that the skin can not breath when a patient who lays in bed or sit for a long time, an existing cushion is not comfortable and not easy to clean and disinfect, the cushion can be attached to the skin, noises, mechanical failures and power failure exist, and the usage cost is high are solved; and particularly in summer, the patient sweats easily, the protection cushion is breathable, sweat-permeable, urine-permeable and cool in summer, the indoor environment in winter is good, the patient can sit in the cushion which is clean, quiet and reliable, pains of the patient can be relieved, the recovery of the patient is facilitated, and a large amount of capital can be saved for the patient.