Double-circuit switching PCB diode welding detection device

The utility model discloses a double-circuit switching PCB diode welding detection device which comprises a shell, a detection assembly, a loop switching switch and a power source. The shell is divided into an upper part and a lower part which can be freely separated and detached, the detection assembly, the loop change-over switch and the power supply are all installed in the shell, the detection assembly is used for detecting whether two paths of LEDs which are welded are well welded, the loop change-over switch is used for switching processing between the two paths of LEDs, and the power supply is used for supplying power to the detection assembly. According to the utility model, the loop change-over switch is additionally arranged between the two paths of LEDs, free switching between the two paths of LEDs can be realized through the toggle switch, repeated connection detection is not needed, and whether the color sequence of the wire harness on a product is correct or not can be correctly and visually det