Abstract: [Objective] To investigate the effect of distal concave side of lumbar scoliosis spreading technology in transforaminal lumbar interbody fusion (TLIF) for degenerative lumbar scoliosis (DLS) patients with type B and type C coronal imbalance. [Methods] A retrospective study was made on 42 DLS patients with type B (26 cases) and type C (16 cases) coronal imbalance.All underwent TLIF with distal concave side of lumbar scoliosis spreading technology, the pain visual analog scale (VAS) score, lumbar Oswetry dysfunction index (ODI) and health survey summary table (SF-36) score were evaluated, the coronary and sagittal imaging parameters were measured. [Results] At the last follow-up, the VAS score and ODI decreased, and the SF-36 score increased in the type B and C groups, while there was no statistically significant difference between the two groups (P>0.05).The Cobb angle, lumbosacral tilt angle, coronal imbalance (CI), pelvic tilt angle (PT), pelvic incidence minus lumbar lordosis mismatch (PI-LL), sagittal vertical axis (SVA) were both reduced and maintained well at the last follow-up, but there was no statistically significant difference between the groups (P>0.05). [Conclusion] Distal concave side of lumbar scoliosis spreading technology in TLIF could provide remarkable radiographic and clinical outcomes in DLS patients with type B or C coronal imbalance, which can correct coronary surface imbalance and improve quality of life.