A power line includes: a fixing base, a pull lug and a power line, where the fixing base has a connection portion, an abutting surface abutting the socket and an outer side with the back facing the abutting surface, the abutting surface is provided with a plurality of plug pins, and one of the plug pins is inserted into a plug hole of the socket; and the pull lug surrounds the periphery of the fixing base, an interval exists between the pull lug and the fixing base, the pull lug has a first end and a second end which are connected to the connection portion, and the first end and the second end have elastic deflection, so that the pull lug performs direction rotation by means of the first end and the second end, and one end of the power line is connected to the power line plug.