Spasticity is unavoidable in patients with spinal cord injury above the conus site due to upper motor neuron injury. Prevention of spasticity focuses on eliminating or reducing the various factors that trigger an exacerbation of spasticity. Measures that can be taken include keeping the environment quiet; relieving the patient’s mental tension, training techniques to be gentle, and avoiding stimulation of the feet and hands; using the prone position to help inhibit hip flexion spasms, and standing training to help inhibit gastrocnemius spasms; paying attention to the position of the paralyzed limb in the early stages of spinal cord injury to promote trunk extension reflexes and avoid flexion spasms. If the cervical and upper thoracic spinal cord injuries take a prone position, passive movement of the limb and training to restore the upright position are conducive to promoting the extensor reflex. Actively treat complications such as urinary tract infection and decubitus ulcers to avoid spasticity caused by drastic changes in room temperature, tight clothing and footwear, and filling of the bladder and rectum. Helping patients to perform cycling action exercise can significantly reduce the spastic state.