Power supply of 3D printer

The utility model discloses a 3D printer power supply, which comprises an adapter main body and a power line, the adapter main body is provided with an interface, the end part of the power line is provided with a plug, and the plug is plugged with the interface; a molded flexible elastic sheet is arranged on the power line, two end parts of the molded flexible elastic sheet are fully stretched under traction force and then are unfolded into a planar strip-shaped body, and the power line is arranged along the same side surface of the molded flexible elastic sheet; and releasing the traction force of the two end parts of the formed flexible elastic sheet, enabling the two end parts of the formed flexible elastic sheet to naturally recover the deformation and to be mutually crossed and bent by taking the middle part of the formed flexible elastic sheet as a base point, and enabling the side edges of the two end parts after being mutually crossed and bent to be close to each other to form a contact point. Accordi