Package protection box of power supply

The utility model belongs to the field of power supply protection boxes, and particularly relates to a power supply packaging protection box which comprises an upper paper support and a lower paper support arranged below the upper paper support. An upper connecting frame and a lower connecting frame are fixedly connected to the outer surface of the upper paper support and the outer surface of the lower paper support respectively, fixing frames are fixedly connected to the periphery of the top of the upper connecting frame, mounting plates matched with the fixing frames are fixedly connected to the periphery of the top of the lower connecting frame, and inserting grooves are formed in the opposite sides of the two mounting plates on the same side. Inserting rods matched with the inserting grooves are in threaded connection between the opposite sides of the two fixing frames on the same side through threaded mechanisms. The movable frame and the inserting rod enter the inserting groove in the mounting plate thr