The invention discloses a digitized anti-bedsore air cushion device which is composed of an air cushion unit, an air pump unit and an air cushion control unit. For an air cushion with ten air pipes equally divided into five groups, laser micro holes are punched in areas contacted with a patient, and the skin of the patient is favorably dried. An air pump outputs pressure air to an air tank, and air pressure is controlled highly precisely by adopting a PI closed loop; the air tank is provided with five three-digit three-tee electromagnetic directional valves, the five groups with ten air pipes are subjected to multiple charging/exhausting, and semi-quantitative adjustment of the air pressure is reserved after exhausting of the air pipes, in other words, open-loop control over switching value is implemented. Mixed control over the switching value and closed/open ring is simulated, patient experience satisfaction is improved on the basis of high-precision air pressure of the air cushion and due to the multiple charging/exhausting mode; multiple air pressures can be reserved after exhausting of the air pipes, and the patient experience satisfaction is improved from the other direction; the mixed control has the advantages of reliability and low cost. In addition, a user-defined operation mode is additionally arranged apart from a factory operation mode, and the patient experience satisfaction is further improved.