The invention provides an antenna device, comprising a first radio frequency transceiving circuit, a first matching circuit, a second radio frequency transceiving circuit, a second matching circuit and a metal shell, wherein the metal shell is provided with a micro gap strip and a gap, the micro gap strip comprises a plurality of micro gaps, the gap intersects with the plurality of micro gaps, the micro gap strip is arranged in an edge area adjacent to the short edge of the metal shell, the first radio frequency transceiving circuit is electrically connected with the metal shell via the first matching circuit, and the second radio frequency transceiving circuit is electrically connected with the metal shell via the second matching circuit. The antenna device can ensure the overall appearance effect of a mobile terminal, realizes coverage of the whole frequency band of a main antenna and avoids adverse influence on the radiation performance of the antenna when held by hand. The invention further provides a mobile terminal.