To explore the possibility of bladder reinnervation and artificial triggering voiding established by Achilles tendon reflex after spinal cord injuries above cone. Bilateral anterior roots of S 1 and main bladder innervating roots (S 2 or S 3) in 8 patients were severed intradurally and then anastomosed to establish artificial reflex arc of "Achilles tendon spinal cord bladder". After followed up for an average of 2 8 years, it was found that the patients were free from nocturnal incontinence, with micturition frequency of 5～6/d, and the urinary volume varied from 250 to 500 ml each time. The results suggested that artificial reflex arc of "Achilles tendon spinal cord bladder" could restore bladder function in patients with spinal cord injuries above cone