The present disclosure provides a device to be charged, a wireless charging device and a control method thereof. The device to be charged includes: a wireless receiving circuit, configured to receive an electromagnetic signal transmitted by a wireless charging device and convert the electromagnetic signal to a first output voltage; a step-down circuit, configured to perform step-down process on the first output voltage to obtain a second output voltage, and charge a battery of the device to be charged based on the second output voltage; a temperature detecting circuit, configured to detect a temperature of the device to be charged; a communication control circuit, configured to send feedback information to the wireless charging device, when the temperature is larger than a preset threshold. The feedback information is configured to trigger the wireless charging device to control wireless charging process to reduce the first output voltage.