Objective To evaluate the evaluation of posterior cervical open door laminoplasty with conventional spinousprocesses and conventional cervical spine the efficacy of single-door open-door laminoplasty for the treatment of cervical spondylotic myelopathy. Methods The clinical data of 62 patients with cervical spondylotic myelopathy treated in our hospital from July 2016 to January 2019 were retrospectively analyzed. They were divided into the improved group and the control group according to the operation method. The patients in the improved group were treated with single open-door laminoplasty with spinous process preserved, while the patients in the control group were treated with traditional single open-door laminoplasty without spinous process preserved. The operation time, intraoperative blood loss (intraoperative blood loss+postoperative wound drainage) and axial symptoms of the two groups were recorded and compared; The Japanese Orthopaedic Association (JOA) score and improvement rate of cervical spine were analyzed and compared between the two groups.Results All patients were followed up for 6 to 25 months. There was no significant difference in operation time between the two groups (P＞0.05). At the last followup, the JOA score of the two groups was significantly improved compared with that of the same group before operation, and the difference was not statistically significant (all P＞0.05). There were 7 cases of axial symptoms in the improved group and 8 cases in the control group. The symptoms were relieved after conservative treatment. There was no significant difference between the two groups (P＞0.05).Conclusion Compared with the traditional open-door laminoplasty in the treatment of cervical spondylotic myelopathy,spine preserving open-door laminoplasty can also obtain effective spinal cord decompression, achieve good clinical effect and less complications, and spine preserving open-door laminoplasty can reduce the amount of bleeding and simplify the operation steps.