The antenna device and the terminal device

The invention discloses an antenna device and terminal equipment, and relates to the technical field of communication. The antenna device comprises an antenna, a printed circuit board and a first switch. A feed point and a first ground point are arranged on the printed circuit board, the antenna is connected to the feed point and comprises a first branch knot, and the tail end of the first branch knot is connected to the first ground point by the first switch; when the first switch is turned on, the tail end of the first branch knot is communicated with the first ground point; when the first switch is turned off, the tail end of the first branch knot is suspended. The terminal equipment comprises the antenna device, a radiofrequency module and a switch control module. The radiofrequency module and the switch control module are respectively connected to the antenna device. The antenna device and the terminal equipment have the advantages that different resonance frequencies of the antenna can be switched over under the control of switches arranged at the tail ends of branch knots of the antenna, and accordingly reduction of the efficiency of the antenna due to switching loss and increase of duty cycle spaces of the antenna can be prevented.