The invention discloses an induction coil structure comprising at least one induction coil layer formed by winding by a lead. The number of turns for each induction coil layer is 3 to 20; the maximum external diameter is 10 to 100 millimeters; the diameter of the lead is 0.1 to 5 millimeters; and the self-inductance value of the induction coil is 5 to 30 microhenris. In addition, the invention also discloses a wireless charging device comprising a coil matching circuit for generating an induced current, a chip peripheral circuit, and an output interface circuit; the chip peripheral circuit connected with the coil matching circuit is used for rectifying the induced current; and the output interface circuit connected with the chip peripheral circuit is used for outputting the rectified induced current to a to-be-charged device to realize charging. According to the induction coil structure and the wireless charging device, the small-size induction coil for wireless charging is provided and is formed by winding by the lead, so that the thickens can be reduced and the precision can be improved. Moreover, on the condition of multi-layer existence, connectivity of all induction coil layers can be guaranteed, so that the charging effect can be ensured.