To provide anatomic basis for treating cubital tunnel syndrome(CTS) through anterior transposition of the ulnar nerve involving blood supply.We detected the ulnar nerve and its blood supply in the elbow region(ER) of adult cadavers upper limbs which were injected with red-colored latex(n=30), other 6 fresh adult cadavers upper limbs were injected with modifed gelatin-lead oxide, taken radiographs after dissociated the ulner nerve and blood vessels.