An array substrate, a display panel, a display device and a wearable device are provided. The array substrate includes a near field communication antenna which is arranged in conductive layers of the array substrate, and the near field communication antenna includes: a main coil and a secondary coil, the main coil and the secondary coil are located in different conductive layers of the array substrate, and one terminal of the main coil is electrically connected to one terminal of the secondary coil through a first via hole of the array substrate, and the other terminal of the main coil is electrically connected to the other terminal of the secondary coil through another first via hole of the array substrate.