Abstract:[Objective] To investigate the effects of degenerative lumbar spinal stenosis (DLSS) involved segments on sagittal spinopelvic parameters. [Methods] A retrospective analysis was performed on 192 patients with DLSS admitted to our hospital from November 2019 to November 2021. According to the imaging, 72 cases had DLSS involved a single segment (SS), 63 cases involved double segments (DS), and 57 cases involved multiple segments (MS). The clinical and imaging data of the three groups were compared. [Results] There was no significant difference in lumbar VAS score, leg VAS score and ODI score among the three groups (P＞0.05), but the disease course was ranked down-up in a sequence of SS＜DS＜MS [(30.5±35.2) months vs (55.9±44.4) months vs (82.3±70.0) months, P＜0.001]. In term of imaging, the lumbar lordosis (LL) [(43.4±10.4)° vs (41.1±7.6)° vs (35.6±8.4)°, P＜0.001], thoracic kyphosis (TK) [(28.6±7.1)° vs (27.9±7.6)° vs (23.2±7.3)°, P＜0.001], sacral slope (SS) [(31.0±6.2)° vs (29.6±5.0)° vs (26.0±5.1)°, P＜0.001] were all ranked up-down as SS＞DS＞MS, whereas the pelvic tilt (PT) was ordered down-up as SS＜BS＜MS [(21.6±7.0)° vs (21.8±4.2)° vs (24.9±6.5)°, P=0.005]. [Conclusion] As the DLSS involved segment number increases, the lumbar lordosis, thoracic kyphosis and sacral inclination decrease, whereas the pelvic inclination increases.