Abstract： To observe the therapeutic effects of peridural injection of Mailuoning Compound Liquor (脉络宁复合液) for prolapse of lumbar intervertebral disc (PLID). Methods: Peridural injection of Mailuoning Compound Liquor (MCL) was given to 100 cases of PLID, once a week, 4 sessions constituting a therapeutic course. By adopting the scoring method, observations werecarried out on the total therapeutic effect and changes in the 13 items of the symptoms and signs. Results: After treatment, the JOA scores in this series of patients were markedly enhanced as compared with the scores before treatment, showing significant differences in the paired t test (P<0.05). The sum of the excellent and good rates was 64%, and the total effective rate was 97%. All the scores in the 13 items under observation were significantly raised as compared with the scores before treatment (P<0.05). Conclusion: Peridural injection of MCL is an effective and safe therapy for PLID, and with shorter treating course, quicker therapeutic effects, and less suffering for the patients.