The invention discloses a power cable tray storage device, comprising a base and two hinging racks arranged on two sides of the base; each hinging rack includes support arms, the upper ends of the support arms are hinged together through hinge shafts, a half ring is fixedly connected between two ends of each hinge shaft, the lower ends of the support arms are clamped to four corners of the base through fasteners, the equal height parts of the support arms are correspondingly provided with a transverse arm, and an upper rack supported by the transverse arms are arranged between every two hinging racks, the upper racks are locked tightly to the transverse arms, and the middle of each upper rack is provided with an upper rack hole for clamping the power cable tray. The power cable tray storage device has the advantages that the power cable tray storage device is reasonable in structure and is suitable for quick assembly during use, vertical stacking with the power cable tray placed transversely cans be achieved, placement is reliable, and picking is simple; detaching, storage and small space usage can be facilitated when the power cable tray storage device is not in use; the power cable tray storage device is especially suitable for the quick storage of mass power cable trays in a space-limited warehouse.