OBJECTIVE：To explore the availability of revised posterior unilateral open-door laminoplasty through iconography parameters,clinical outcomes to multiple-segment cervical spondylosis myelopathy;and to compare with traditional operative procedure. METHODS:Prospective study.Disign the inclusive and exclusive criterions of patients suffering cervical spondylosis myelopathy. The study was authorized by the Hospital's Ethics Committee. The patients and relations were informed consent.And,patients participated in study were labeled based on the admitted order.Then odd labeled patients were implemented traditional single open-door and even labeled patients revised procedures.Fathermore,they all were follow-up according to same protocolplaned preoperatively,which included clinical evaluations(mJOA score),iconography parameters(cervical ROM（Range of Movement），cervical lordosis,spinal canal expansive ratio and spinal cord posterior shift score).The data were analysed by SPSS-20. RESULTS:85 patients underwent laminoplasty surgery after preoperative informed consent.According to categories,43 got C3-7 single open-door laminaplasty and 42 revised procedures.Exceptmissed followed patients,78 patients followed rountingly. Traditional surgery group’s average following-up time is 16.9±5.6months,and revised surgery group 17.1±6.1months.There were no difference about age,agender,segments suffered,intraoperative blood loss,surgery time.And,But,there was signiffcant difference between postoperative drainage volume.Iconography parameters are similar between groups.At the last following-up,there was no difference of overall complications between groups,but less axial pain happened at revised group. CONCLUSION: Revised unilateral open-door laminoplasty is an safe and valid procedure to multiple cervical spondylosis myelopathy,compared to traditional procedure.Both have similarly good clinal outcome and iconography parameters.But,there are less axial pain and revision surgery in revised group.