The low-frequency magnetic field attenuation of fiberreinforced laminated composite cylinders is analyzed, based on a model which treats the composite cylinder as a multi-layered enclosure and then assumes that each layer is homogeneous and anisotropic. In this study, an analogy between isotropic and anisotropic cylinders is derived. Based on the analogy relationship, numerical results for magnetic field attenuation are p r e sented for [0"/90"] graphite/epoxy cylinders. In particular, the parameters to influence the magnetic field attenuation, such as the geometry and material properties, are investigated in detail.