Purpose <p>The purpose of this umbrella review was to systematically evaluate the effectiveness of therapeutic strategies for managing low anterior resection syndrome following sphincter-preserving surgery for rectal cancer and to provide evidence-based recommendations for clinical practice.</p> Methods <p>A systematic literature search was performed across five electronic databases. Two independent reviewers screened titles/abstracts, assessed full-text studies, and extracted data, with discrepancies resolved by consensus. The study adhered to AMSTAR-2 and GRADE frameworks for methodological quality and evidence certainty assessments.</p> Results <p>Sixteen systematic reviews (including nine meta-analyses) published between 2018 and 2025 were analyzed, covering therapeutic strategies such as transanal irrigation, pelvic floor rehabilitation, sacral nerve stimulation, percutaneous tibial nerve stimulation, pelvic floor muscle training, and biofeedback therapy. For quality assessment, two studies were evaluated as moderate quality, five as low, and nine as critically low.</p> Conclusion <p>TAI and PFR are recommended as first-line therapies for LARS, while SNS or PTNS may be considered for refractory cases, especially those with predominant fecal incontinence. Future research should focus on standardizing protocols, improving patient compliance, and conducting high-quality randomized controlled trials to strengthen the evidence base.</p>