The invention provides a near-field communication antenna device, belonging to the field of wireless communication. The antenna device is constructed in a mobile electronic device and comprises a shell conductor layer, an insulation layer, a coil conductor, a flexible substrate and a magnetic material layer, wherein the coil conductor is an annular or spiral coil taking a winding central part as a coil opening part, and the other side, to which coil conductor is attached, of the flexible substrate is assembled with a magnetic material; the coil conductor is shaded and divided into two regions by the shell conductor layer, a first region is a non-shell conductor layer shading part, namely an actual magnetic link coupling part of the antenna, and the region adopts the magnetic material to cover so as to improve the magnetic field radiation capability of the antenna; a second region is a shell conductor layer shading part, the region does not adopts the magnetic material to cover so as to reduce ohmic loss of the antenna brought by the loss of the magnetic material, and the magnetic field density in the region is also reduced; meanwhile, eddy-current loss brought by the conductor layer is reduced, and the reading-writing distance of the antenna is increased.