Safe power supply detection circuit of power switch cabinet

The invention discloses a safe power supply detection circuit of a power switch cabinet, and relates to the field of power supply detection, and the circuit comprises a main line detection module which is used for collecting the voltage of a main line of the switch cabinet, obtaining the sampling voltage of the main line, and outputting the sampling voltage to a safe power supply judgment module; compared with the prior art, the system has the beneficial effects that the voltage information of a main line is obtained through the main line detection module, the voltage information of a branch line is obtained through the branch line detection module, and whether the difference value of the voltage information of the main line and the voltage information of the branch line is within a set range is judged through the safe power supply judgment module; the power supply line is judged to be abnormal, and the detection is convenient and fast; the power-off prompting module is arranged, and after the power supply li