Objective: To observe the results of expansive open-door laminoplasty of cervical spine for cervical spinal stenotic myelopathy. Methods: From March 1995 to March 2000

21 cases were treated by expansive open-door laminoplasty of cervical spine and had been followed up for 3 months to 4 years and 5 months. Results: Good results were obtained at 2 weeks and 3 months after operation among the CSM（11 cases）

DCS（8 cases）and OPLL(2 cases). The symptoms and signs were improved

and instability of the cervical spine and reclosed open-door were not found. Conclusion: The results of expansive open-door laminoplasty of cervical spine for cervical spinal stenotic myelopathy were good and stable

there were fewer complications and less hemorrhage

and it did not affect the stability of cervical spine.