Objective: To report the occurrence, management and outcome of late-onset traumatic dehiscence and islocation of laser assisted in situ keratomileusis (LASIK) flaps. Treatment and Results: One patient occurred ate-onset LASIK corneal flap dislocation after ocular trauma 7days after surgery. The flap was lifted, stretched, and epositioned after irrigation and scraping of the stromal bed and the underside of the flap. A bandage contact lens as placed, and topical antibiotic and corticosteroids were given postoperatively. The dislocated corneal flap was successfully repositioned in the case. The dislocated flap was repositioned 7 days after the trauma, and the patient recovered his uncorrected visual acuity (UCVA) of 10/20, 20/20 day 1 and day 20 after the procedure, of 20/20 20 days later and had a well-positioned flap with a clear interface. Diffuse lamellar keratitis developed in the patients hat resolved with the use of topical corticosteroids. Conclusion: Laser in situ keratomileusis corneal flaps are ulnerable to traumatic dehiscence and dislocation, which should be pay more attention to it for us.