[Objective] To compare the clinical outcomes of UBE versus PIED for lumbar lateral recess stenosis with discherniation.[Methods] A total of 60 patients with single-segment lumbar lateral recess stenosis accompanied by discherniation in our hospital from November 2018 to November 2020 were divided into UBE group(30) and PIED group(30) according to the results of preoperative doctor-patient communication.The perioperative, follow-up and auxiliary examinations documents were compared between the two groups.[Results] The UBE group had significantly shorter operation time and longer incision length than the PIED group (P < 0.05),although there were no statistical differences between the two groups in terms of blood loss, fluoroscopy times, time to return walking postoperatively,healing of incision and hospital stay (P > 0.05).There was no significant difference in the time of full-weight bearing activity between the two groups (P > 0.05). The VAS scores of low back pain and leg pain, as well as ODI scores decreased significantly and the JOA scores increased significantly in both groups over time (P < 0.05). However, there were no statistically significant differences in VAS,ODI and JOA scores between the two groups. In terms of auxiliary examinations, the myoglobin concentration,the anteroposterior diameter of lateral recess and the area of the involved spinal canal increased significantly (P< 0.05) , while the intervertebral space height remained unchanged postoperatively compared with those preoperatively in both groups (P>0.05).[Conclusion] Both UBE and PIED are effective and minimally invasive techniques for lumbar lateral recess stenosis with disc herniation, but UBE has shorter operation time.