The invention relates to the technical field of on-line testing of
light emitting diode production and manufacturing, and provides an LED testing circuit and a testing method thereof. The method comprises the following steps: providing a
test power supply for a to-be-tested plate provided with a to-be-tested multicolor
light emitting diode, and lightening
light emitting diode lamps with different colors on the to-be-tested plate one by one according to a preset color; after a light emitting
diode with a color to be detected is turned on every time, three paths of
light sensing parameters of current light emitting are collected through a
light sensing sensor, the three paths of
light sensing parameters are compared, and the color actually emitted by the current light emitting
diode is determined according to a preset color judgment logic and the size relation of the three paths of light sensing parameters; comparing the actually judged color with the currently-lightened preset color, if the color is consistent with the currently-lightened preset color, judging that the light-emitting
diode works normally, and if the color is not consistent with the currently-lightened preset color, judging that the light-emitting diode works abnormally; and testing of all the to-be-detected color light emitting diodes is completed successively, and a final LED testing result is obtained.