The invention relates to a medicine for treating prolapse of lumbar intervertebral disc. The preparation method for the medicine comprises the following steps that: medicines such as phrymaceae, buck grass, slenderstyle acanthopanax barks, cortex lycii radicis, dittany, heracleum hemsleyanum, common monkshood mother root, kusnezoff monkshood, safflower, Chinese ephedra, dried ginger, pollen, artemisia leaves, cassia barks and so on are mixed and ground into powder, and then packaged into a medicine bag. When the medicine is used, the medicine bag is immersed into water solution of hot peppers and vinegar, placed on a suffered lumbar part of a patient and heated, and then absorbed through hot application. The medicine can disperse stagnancy and dredge channels, relieve rigidity of muscles and promote blood circulation, reduce swelling and alleviate pain, and stimulate circulation to end stasis, can adjust the water filling level of nucleus pulposus and make the protruded nucleus pulposus retracted, eliminate irritation symptoms of edema, and repair damaged anulus fibrosus, is quick to take effect, has no side effect, and can not cause recrudescence after cure.