Multi-channel power supply system with adjustable input voltage and vehicle

The utility model belongs to the technical field of automobile lamps, and particularly relates to an input voltage adjustable multi-channel power supply system and a vehicle. The input voltage adjustable multi-channel power supply system comprises a control module, and a constant voltage source module and a linear constant current source module which are electrically connected with the control module; the linear constant current source module is connected with a load; the constant voltage source module is electrically connected with the linear constant current source module; the linear constant-current source module is suitable for identifying the voltage of the load end and extracting the current value of the output end of the constant-voltage source module to set the voltage value output by the constant-voltage source module, so that the voltage value of the LED at the load end is monitored in real time, the output voltage of the constant-voltage source module reaches the minimum value for enabling a linear