Multi-user quantum identify authentication scheme, based on the photon orbital angular momentum,is proposed.Authenticated users of the distributed network are encoded with quantum orbital angular momentum and then different nodes share two photon orbital angular momentum entanglement states with sub-servers.Firstly the trusted center of the network groups the quantum users with the phase factor of orbital angular momentum.Secondly authentication parties realize quantum teleportation of the orbital angular momentum by the entanglement of quantum orbital angular momentum.The protocol makes use of quantum information to guarantee the security of authentication system,and realizes multi-user authentication of network system by photon OAM.When the OAM state has two orthogonal polarization directions and the topological charge is equal to li(i=1,2,…,4),the quantum authentication efficiency can be improved 2×li by many times.