Abstract: The present invention discloses a wireless charger, comprising a front shell (1) and a rear shell (6), wherein the front shell comprises a plane and a step seat arranged under the plane, in which a smart phone can be placed to be charged. An electromagnetic induction charging device is arranged between the front shell (1) and the rear shell (6) and comprises a magnetic induction coil (2) for wirelessly charging a smart phone. The rear end of the electromagnetic induction device is provided with a cooling device comprising a cooling fan (3) which extracts air to discharge air in the direction of an air duct; a sealing device (4) configured to seal the air duct and the cooling fan together; and an air duct. The front shell (1) is provided with cooling holes allowing air to enter so as to increase air flow when the cooling fan works.