Spinal cord injury (SCI) elicits sensory, motor, and autonomic dysfunctions caudal to the lesion site, resulting in enduring functional deficits. Successful recovery hinges upon compensatory axonal sprouting from intact neurons or regeneration of damaged axons, a process constrained by transcriptional regulatory dynamics. Epigenetics emerges as a pivotal determinant in instigating and sustaining regenerative transcriptional cascades. Specifically, histone covalent modifications intricately modulate post-injury chromatin restructuring, consequently influencing transcriptional dynamics. This review delineates the epigenetic regulatory framework governing post-SCI axonal regeneration, emphasizing the role of histone covalent modifications as potential therapeutic targets to enhance clinical interventions for SCI repair.