A coil apparatus of a mobile terminal, wherein the coil apparatus comprises: a metal coil (101, 3, 10); an analog switch connected between the metal coil (3, 10, 101) and a wireless charging chip and a signal receiving chip; characterized in that the coil apparatus further comprises: a coil connection device which is connected between the metal coil (101, 3, 10) and the analog switch, wherein: the signal receiving chip is a Frequency Modulation radio chip or a Near Field Communication chip or a digital television chip; the analog switch comprises a first analog switch and a second analog switch; input ends of the first analog switch and the second analog switch respectively connect with two ends of the metal coil (101, 3, 10) through the coil connection device, the first output ends of the first analog switch and the second analog switch respectively connect with two ends of the wireless charging chip, a second output end of the first analog switch connects with one end of the signal receiving chip, a second output end of the second analog switch is grounded, enable ends of the first analog switch and the second analog switch respectively connect with a base band processing chip. a metal coil (101, 3, 10); an analog switch connected between the metal coil (3, 10, 101) and a wireless charging chip and a signal receiving chip; characterized in that the coil apparatus further comprises: a coil connection device which is connected between the metal coil (101, 3, 10) and the analog switch, wherein: the signal receiving chip is a Frequency Modulation radio chip or a Near Field Communication chip or a digital television chip; the analog switch comprises a first analog switch and a second analog switch; input ends of the first analog switch and the second analog switch respectively connect with two ends of the metal coil (101, 3, 10) through the coil connection device, the first output ends of the first analog switch and the second analog switch respectively connect with two ends of the wireless charging chip, a second output end of the first analog switch connects with one end of the signal receiving chip, a second output end of the second analog switch is grounded, enable ends of the first analog switch and the second analog switch respectively connect with a base band processing chip. a coil connection device which is connected between the metal coil (101, 3, 10) and the analog switch, wherein: the signal receiving chip is a Frequency Modulation radio chip or a Near Field Communication chip or a digital television chip; the analog switch comprises a first analog switch and a second analog switch; input ends of the first analog switch and the second analog switch respectively connect with two ends of the metal coil (101, 3, 10) through the coil connection device, the first output ends of the first analog switch and the second analog switch respectively connect with two ends of the wireless charging chip, a second output end of the first analog switch connects with one end of the signal receiving chip, a second output end of the second analog switch is grounded, enable ends of the first analog switch and the second analog switch respectively connect with a base band processing chip. the signal receiving chip is a Frequency Modulation radio chip or a Near Field Communication chip or a digital television chip; the analog switch comprises a first analog switch and a second analog switch; input ends of the first analog switch and the second analog switch respectively connect with two ends of the metal coil (101, 3, 10) through the coil connection device, the first output ends of the first analog switch and the second analog switch respectively connect with two ends of the wireless charging chip, a second output end of the first analog switch connects with one end of the signal receiving chip, a second output end of the second analog switch is grounded, enable ends of the first analog switch and the second analog switch respectively connect with a base band processing chip.