The recurrence of orthodontic issues after treatment is a common clinical concern. Addressing how to minimize recurrence and shorten the retention period is a prominent research focus in orthodontics. Low-level laser therapy (LLLT) is a treatment method that stimulates cell proliferation and differentiation through photobiomodulation, characterized by effective penetration and biosafety compared to other methods for reducing recurrence. Most research findings indicate that when combined with traditional retainers, LLLT can decrease the orthodontic recurrence rate and retention period within specific parameter ranges. Studies have suggested that LLLT influences tissue remodeling and repair by impacting Matrix metalloproteinases (MMPs), Adenosine Triphosphate (ATP), protein synthesis, cytokines, and more. It can enhance the stability of orthodontic treatment, with its mechanism linked to the remodeling of periodontal ligament (PDL) fibers and alveolar bone. Further exploration of LLLT′s application in orthodontic retention holds significant scientific research and clinical guidance implications. This paper provides a review of experimental studies, mechanisms, and key parameters of LLLT in orthodontic retention.