目的　探讨椎管内肿瘤后路手术方法的改进和临床疗效。方法　对 2 1例患者采用腰椎板切开、肿瘤切除椎板关闭手术。结果　肿瘤全部切除 18例 ,部分切除 3例。随访半年以上者 ,17例患者腰痛消失 ,复查 X光线见脊柱稳定性好。结论　该术式对椎管内肿瘤的治疗彻底 ,能有效地防止全椎板切除术后脊柱稳定性差、纤维瘢痕粘连的并发症 Objective To explore the improvement and clinical efficacy of posterior approach in spinal canal tumor. Methods Twenty-one patients underwent lumbar laminectomy and tumor resection laminoplasty. Results All tumors were resected in 18 cases and partially resected in 3 cases. Follow-up more than six months, 17 patients with low back pain disappeared, X ray review of the spinal stability. Conclusions This procedure is a thorough treatment of intraspinal tumors and can effectively prevent the complications of poor stability of the spine after total laminectomy and fibrous scar adhesions