Reverse power supply device based on HDMI (High Definition Multimedia Interface) and video equipment

The utility model provides a reverse power supply device based on a high-definition multimedia interface (HDMI), which is used for supplying power to power receiving equipment, and the power receiving equipment comprises a first microcontroller, a first voltage division circuit with preset impedance and a first HDMI. The device comprises a second HDMI interface, a first power supply device, a detection controller and a second voltage division circuit with preset impedance, the ADC end and the ARC end of the detection controller are connected to the ARC end of a first microcontroller through the second voltage division circuit, the second HDMI interface, the first HDMI interface and the first voltage division circuit in sequence, and the GPIO end of the detection controller is connected with one end of the first power supply device. The other end of the first power supply device is connected to the VCC end of the first microcontroller through the second HDMI interface and the first HDMI interface in sequence;