The utility model discloses a detection bench of a power quality monitoring device. The detection bench comprises a test rack and a detection table. The test rack is arranged on the upper-left part of the detection table. The test rack is composed of three layers, the first layer is provided with three intervals, and the second layer and the third layer are provided with twelve meter positions for placing the detected power quality monitoring device. By adopting the detection bench provided by the utility model, the integrated management of the equipment is facilitated, and a controller used for detection can be placed on the right side of the detection table, so that in detection, most circuits needing to be connected can be connected in advance, the detection can be performed just by connecting the detected device to the circuits, and the wiring workload is reduced.