Abstract: An anisotropic magnetized plasma channel antenna(AMPCA) for radiating high power microwave is presented. The concrete realization method of AMPCA is simply described. The operating principle of AMPCA is given, and the electromagnetic model of AMPCA is created. The wave equations for the longitudinal electromagnetic fields are deduced, and the relations between the transverse electromagnetic fields and the longitudinal ones of anisotropic magnetic plasma in generalized cylindrical coordinate are given. The characteristic equation of modes for AMPCA is deduced by applying the boundary conditions of electromagnetic fields. In the limit cases, the results of this paper are consistent with that given in literature’s. The dispersive curves of modes for AMPCA are calculated.