The invention discloses a wireless charging device of small-sized electronic equipment, which mainly comprises an emission device and a receiving device, wherein the emission device comprises an external crystal oscillator, a frequency divider, a D-type power amplifier driving chip or a mutual inductance coupler, a D-type power amplifier module, a resonant filter circuit, an emission coil, a level switching module, a level detecting module, a control module, an indicator lamp and a buzzer; and the receiving device comprises a receiving coil, a receiving-end impedance matching network, a rectification filter module and a voltage stabilizing module. The wireless charging device provided by the invention can be applied to carrying out wireless charging on all low-power (5 W or less) electronic equipment including mobile phones, MP3 (Moving Picture Experts Group Audio Layer-3) players, MP4 (Moving Picture Experts Group Audio Layer-4) players, cameras and the like, thereby realizing that certain voltage and power are supplied to charge or supply power in a distance range meeting a design requirement. The wireless charging device of the small-sized electronic equipment has the advantages of simple structure, wide application, capability of efficiently charging in a certain distance, safety and no radiation, and the like.