Objective:　To observe dynamic changes of intracellular calcium (［Ca2+］i) after spinal cord injury, and to study the relationship between the changes of ［Ca2+］i and the functional damage of the spinal cord.rn　　Methods:　The rats were subjected to a spinal cord contusion by using a modified Allens method. The ［Ca2+］i in the injured segment of the spinal cord was measured by the technique of La3+ blockage and atomic absorption spectroscopy at 1, 4, 8, 24, 72, and 168 hours after injury. The motor function on the inclined plane was measured at the same time.rn　　Results:　The spinal cord ［Ca2+］i increased significantly (P<0.05 or P<0.01) after spinal cord injury. There was a significant correlation (P<0.05) between the changes of ［Ca2+］i and the motor function. rn　　Conclusions:　［Ca2+］i overload may play an important role in the pathogenesis of spinal cord injury.