The invention discloses a multi-processor power supply management system. The processors are a main processor and slave processors. The multi-processor power supply management system includes a hardware monitoring module which is used for monitoring the operation environment temperature of each processor in real time, a processing module which is used for judging whether each processor is in a high temperature operation environment, and a power supply control module which is used for controlling the power state of each slave processor. The processing module judges whether each processor is in the high temperature operation environment according to the operation environment temperature of each processor which is acquired by the hardware monitoring module in real time, when each processor is in the high temperature operation environment, the processing module cuts off the power supply of each slave processor by the power supply control module. The operation environment temperature of each slave processor is monitored by the hardware, and the power supply state of the slave processor is controlled by the operation environment temperature, thus achieving the effect of actually cutting off the power supply of the slave processor and reducing heat.