This experiment intended to authenticate the compensation and amplification effect of regenerated nerve fibers after nerve injury in primate. The Rhesus Monkeys right ulnar nerves and musculocutaneous nerves were chosed. The proximal impaired ulnar nerve as the proximal end and the distal impaired ulnar nerve musculocutaneous nerve as the distal ends. The ulnar nerve proximal stump fibers can grow into both the ulnar nerve distal stump and the musculocutaneus nerve at the same time and established two different electrophysiological conduction passageway. There exist nerve fibers compensation amplification effect after peripheral nerve injury on Rhesus Monkeys.