The utility model discloses a detection bench of power quality monitoring device, including a supporting bench and a test jig, prop up supporting bench's the fixed test jig that is provided with in upper end, the test jig includes first test section and second test section, the fixed second test section that is equipped with of lower extreme of first test section, radiator fan is installed to theinner chamber lower extreme of second test section, and radiator fan's upper end is provided with the backup pad, be equipped with the fixed block on the both ends inner wall of first test section respectively, be equipped with in the inner chamber of first test section and place the frame, and the both sides upper end of placing the frame is equipped with the draw -in groove corresponding with the fixed block respectively, and the bottom of placing the frame has seted up the forefront beam hole, placing the rear end of frame and having seted up the second -line beam hole, the rear end outsideof placing the frame corresponds second -line beam hole department and is equipped with pencil collection box. The utility model discloses placing the frame and passing through fixed block and the convenient removal dismantlement of draw -in groove, conveniently place the connection and examined the device, the wiring is convenient.