The invention discloses a traction massage machine for lumbar vertebra, which comprises a base; a sliding main body is arranged above the base, and a plurality of reinforcing ribs are arranged in the sliding main body at intervals; lower pulleys are arranged at the positions corresponding to the gaps of the reinforcing ribs and between the base and the sliding main body; the sliding main body cancarry out horizontal movement relative to the base, and a pillow blank with a pillow surface is arranged above the sliding main body; the upper end of the sliding main body is provided with an elastic component, the upper end of the elastic component is provided with a positioning sleeve, and the upper end of the positioning sleeve is movably provided with a bearing shaft; the bearing shaft can rotate around an axis thereof, and the bearing shaft is propped against the lower surface of the pillow surface. The invention is provided with a spring, when a person with large weight exercises the lumbar vertebra thereof, the spring is propped against the pillow surface so as to prevent the pillow surface from pressing on a limit pulley, thereby avoiding the phenomenon that the pillow surface loses the elasticity and becomes a hard cambered surface propped against the small of the back, so that when a person with large weight exercises the lumbar vertebra thereof, the person also feels comfortable.