 The participants with lumbar disc herniation diseases are treated by Microendoscopic discectomy, and they are divided into four groups depend on whether the defect is repaired with Autologous Bone Marrow Stem Cell BMSCgelatin sponge or not and whether the defect is sutured or not. In the first group,the defect of intervertebral disc is repaired with Autologous Bone Marrow Stem Cell BMSCgelatin sponge and sutured. In the second group, the defect of intervertebral disc is repaired with autologous Bone Marrow Stem Cell BMSCgelatin sponge but not sutured after discectomy. In the third group, the defect of intervertebral disc is sutured but not repaired with autologous Bone Marrow Stem Cell BMSCgelatin sponge after discectomy. In the four group, the defect of intervertebral disc is neither sutured nor repaired with autologous Bone Marrow Stem Cell BMSCgelatin sponge after discectomy. 