Paper made bearing plate capable of supporting electrical device and packaging box thereof

An electrical device packaging box comprising:

• a box body having an accommodation space;
• and
• a paper made bearing plate provided in the accommodation space, the paper made bearing plate including a cardboard and a standing pillar integratedly formed thereon;
• the cardboard having a first surface and a second surface opposite thereto;
• the standing pillar formed on the first surface;
• a periphery of the second surface formed a folded edge on the cardboard, and the folded edge extending away from the second surface;
• the electrical device being able to be accommodated in a containing space surrounded by the second surface and the folded edge;
• wherein the paper made bearing plate stands on a plane by the support of one side of the cardboard and the standing pillar, and the electrical device is positioned on the plane in an angle accordingly.