Vehicle-mounted control device

The utility model discloses a vehicle-mounted control device, which is applied to a vehicle-mounted power amplifier and comprises a signal input interface and a universal serial bus (USB) interface circuit. The signal input interface is used for receiving a first data signal. The USB interface circuit is provided with a signal input end, a first output end, a second output end, a third output end and a fourth output end, the signal input end of the USB interface circuit is electrically connected with the signal input interface, the first output end of the USB interface circuit is used for outputting a control signal, and the second output end of the USB interface circuit is used for outputting an audio signal; the third output end of the USB interface circuit is used for outputting a Bluetooth decoding signal, and the fourth output end of the USB interface circuit is used for outputting a light decoding signal. The USB interface circuit is used for analyzing the received first data signal and outputting the f