A bed-cushion back-support (1) for lumbar recovery having three curved surfaces matching natural physiological curvature matches the natural curvature of the lower backbone of the human body and includes a convex surface (3) for the lumbar vertebrae, and reverse concave surfaces (2,4) for the sacral and lower thoracic vertebrae. The curved bed-surface formed by fixing the bed-cushion back-support on the bed board exactly matches the natural curvature of the backbone of a patient, and provides effective support to the backbone below the midportion of the thoracic vertebrae. With the effect of gravity on the human body, long-term use of the bed-cushion back-support provides long-term traction for an injured backbone, correcting deformities and restoring the functions of the lumbar vertebrae and surrounding tissues.
