[Objective] To investigate the clinical outcomes of posterior decompressing laminoplasty with preservation of spinous ligament complex for Adult Degenerative Scoliosis (ADS) with Lumbar canal stenosis (LCS). [Methods] From January 2014 to January 2019, 25 patients of ADS with LCS were treated by posterior decompressing laminoplasty with preservation of spinous ligament complex in our center. The operation time, intraoperative blood loss, postoperative drainage, postoperative bedrest time, complications were recorded, additionally, visual analogue scale (VAS) for back/leg pain, Oswestry disability index (ODI), continuous walking distance, Cobb angel, Sagittal vertical axis (SVA), Lumbar Lordosis (LL) and surgical satisfaction rate were used for evaluation of the clinical consequences. [Results] The follow-up period lasted for 6-24 months (mean 13.75±4.35 months). All patients received successful operations without serious complications. The mean operation time was 95.61±10.43min, intraoperative blood loss was 83.78±12.45ml, postoperative drainage was 128.62±31.42ml, postoperative bedrest time was 2.86±0.85 days. Cerebrospinal fluid leakage was present in 4% with 1case and lipoliquefying of incision was present in 4% with 1case. The VAS of back pain decreased without statistically significant differences at 1 week postoperatively (P>0.05), and decreased with statistically significant differences at final follow up compared with before operation and at 1 week postoperatively (P<0.01). The VAS of leg pain, ODI and continuous walking distance significantly improved at final follow up compared with before operation and at 1 week postoperatively (P<0.01). No statistical difference was observed in Cobb angle, SVA and LL (P>0.05). Twenty-two patients were very satisfied with the surgical results (88%) and three patients were basically satisfied (12%) at final follow up. [Conclusion] This posterior decompressing laminoplasty with preservation of spinous ligament complex takes advantages of minimized trauma, enhanced postoperative recovery, minimized intraoperative blood loss, minimized complications, and high patient satisfaction for one or two levels ADS with LCS.