Pressure sore preventive multifunctional cushion for bedridden patient

The invention discloses a pressure sore preventive multifunctional cushion for a bedridden patient, comprising a cushion body; the upper surface of the cushion body is provided with a material covering layer, each of four bottom corners of the cushion body is provided with an empty cavity, a second gear meshes with a first gear, a rotary shaft of the second gear is connected with a connecting bar, and one end of the connecting bar far away from the second gear is connected with the rotary shaft of travelling wheels; the pressure sore preventive multifunctional cushion is novel in structure and simple to use, traveling wheels on the connecting bar may be driven by a motor to move through cooperation of the first and second gears, the movement of the travelling wheels allows height adjustment for the cushion body, the needs of different bedridden patients can thus be met, and pressure cores are prevented; meanwhile, the upper surface of the cushion body is provided with the material covering layer, material fil