The aim of the study: to evaluate the improvement of sensory and muscle strength in patients with spinal cord injury and enzyme changes, malondialdehyde, and total antioxidant capacity in the two groups., Double-blind study conducted in 60 patients with traumatic spinal cord injury complications decreased muscle strength or sensory level according to Frankel classification A - E and during first 24 hours of trauma have been admitted in Emamreza hospital. admission status, sensory, motor, according to Frankel classification has been is performed, blood samples To check the amount of enzyme, malondialdehyde and total antioxidant capacity will be taken . The bullous form of methylprednisolone 33mg/kg intravenous infusion within fifteen minutes and after 45 minute, 5.4mg/kg methylprednisolone infusion within 23-47 hours, will continue. Patients were divided into two groups, the first group of methylprednisolone, after obtaining the consent of the patient, erythropoietin, or 500 units per kilogram of body weight as an intravenous infusion over 3 divided doses in three days will be in the second group further treatment will not be added. , In both groups, the rate of enzyme levels, muscle strength, and sensory level at the fourth and eighth days will be check. Inclusion criteria: patients with spinal cord injury and loss of muscle strength and sensory . Exclusion criteria: patients with hypertension poor control ,history of thromboembolic events, patients with brain damage due to a lower GCS determination of the patient's sensory and motor. Variables assessed: Evaluation of malondialdehyde and antioxidant enzyme levels and muscle weakness and sensory level is classified as Frankel .