An antenna of a terminal device, the antenna includes a metal frame, a side of the metal frame is provided with at least two slots, and the slots are ring-shaped slots. Portions of the metal frame at two sides of each slot of the at least two slots are provided with two groups of feed points, and each group of feed points includes an antenna feed point located on a portion of the metal frame at the inner side of the slot, and a ground feed point located on another portion of the metal frame at the outer side of the slot. The metal frame is electrically connected to a floor in the terminal device.