The invention discloses a wireless charger suitable for any lithium battery, and belongs to the technical field of lithium battery wireless charging. The wireless charger uses a bilateral LCC compensation circuit as a topology, and at least two different frequency points are found by designing a set of compensation parameters, so that zero-reactive power is achieved, and the requirements for constant current and constant voltage needed by charging of any lithium battery are met. In order to achieve the work mode that constant current is obtained after constant voltage is obtained, firstly, a current loop controls a system to work in the constant-current mode, then the current loop is switched to a voltage loop when the voltage of the lithium battery reaches a constant-voltage charging threshold, and then the voltage loop controls the system to work in the constant-voltage mode. According to the wireless charger, direct-current converters do not need to be cascaded with a primary side and a secondary side, secondary voltage adjustment of front-stage or rear-stage DC / DC converters is not needed, the cost is reduced, the system complexity is reduced, and the reliability of the systemis improved.