Objective: The aim of this study was to investigate the effects of early rehabilitation on functional recovery and complications in patients with spinal cord injuries. Methods: This study retrospectively analyzed 342 cases of spinal cord injuries. A total of 158 patients receiving rehabilitation 30 days after surgery were included as the control group. A total of 184 receiving rehabilitation within 30 days after surgery constituted the observation group. The two groups were compared regarding motor and sensory function (American Spinal Injury Association scores), activities of daily living (modified Barthel index), functional independence (functional independence rating), and complications (pressure sores, deep vein thrombosis, pain, lung infection, and urinary tract infections). Results: There were no significant differences in motor function scores, sensory function scores, activities of daily living, or functional independence scores between the two groups before treatment (P>0.05). Significant differences were seen after treatment. Incidence of complications was significantly lower in the observation group than the control group (P<0.05). Incidence of pressure sores, pain, lung infections, and urinary tract infections was lower in the observation group than the control group (P<0.05). Conclusion: Early rehabilitation is beneficial to the recovery of motor function and sensory function. It can improve the activities of daily living, increase functional independence, and reduce occurrence of complications.