A wireless charging apparatus , comprising: a voltage converting circuit , configured to receive an input voltage and convert the input voltage to obtain an output voltage and an output current of the voltage converting circuit ; a wireless transmitting circuit , configured to transmit an electromagnetic signal according to the output voltage and the output current of the voltage converting circuit to conduct wireless charging on a device to-be-charged wherein the wireless transmitting circuit includes an inverter circuit and a resonant circuit, wherein the wireless transmitting circuit is configured to convert a provided DC into an AC that is to be coupled to a transmitting coil of the resonant circuit and converted through the transmitting coil into the electromagnetic signal for transmission; and a first control circuit , configured for wireless communication with the device to-be-charged during the wireless charging to acquire information of a battery of the device to-be-charged and configured to adjust, according to the information of the battery of the device to-be-charged , a resonant frequency of the wireless transmitting circuit to adjust a transmission power of the wireless transmitting circuit , wherein the voltage converting circuit is configured to conduct voltage conversion on the input voltage so that the output voltage of the voltage converting circuit provided to the wireless transmitting circuit meets the requirement of an input voltage required by the wireless transmitting circuit , wherein the first control circuit is further configured to obtain, according to the information of the battery of the device to-be-charged , a voltage difference between an input voltage and an output voltage of a step-down circuit of the device to-be-charged and adjust the resonant frequency of the wireless transmitting circuit to make the voltage difference satisfy a preset condition, to reduce temperature rise of the device to-be-charged . a voltage converting circuit , configured to receive an input voltage and convert the input voltage to obtain an output voltage and an output current of the voltage converting circuit ; a wireless transmitting circuit , configured to transmit an electromagnetic signal according to the output voltage and the output current of the voltage converting circuit to conduct wireless charging on a device to-be-charged wherein the wireless transmitting circuit includes an inverter circuit and a resonant circuit, wherein the wireless transmitting circuit is configured to convert a provided DC into an AC that is to be coupled to a transmitting coil of the resonant circuit and converted through the transmitting coil into the electromagnetic signal for transmission; and a first control circuit , configured for wireless communication with the device to-be-charged during the wireless charging to acquire information of a battery of the device to-be-charged and configured to adjust, according to the information of the battery of the device to-be-charged , a resonant frequency of the wireless transmitting circuit to adjust a transmission power of the wireless transmitting circuit , wherein the voltage converting circuit is configured to conduct voltage conversion on the input voltage so that the output voltage of the voltage converting circuit provided to the wireless transmitting circuit meets the requirement of an input voltage required by the wireless transmitting circuit , wherein the first control circuit is further configured to obtain, according to the information of the battery of the device to-be-charged , a voltage difference between an input voltage and an output voltage of a step-down circuit of the device to-be-charged and adjust the resonant frequency of the wireless transmitting circuit to make the voltage difference satisfy a preset condition, to reduce temperature rise of the device to-be-charged . <EOS>