Electric power wire appurtenance that flare -outs for make things convenient for the operation of flare -outing of wire. It includes box, fixer, apron, warning light and spring, is equipped with the recess at the top of box, and the right side wall of recess is the arc surface in first, the second that sets up from top to bottom, is equipped with the spout at the box top, and slidable mounting has insulating apron in the spout, the fixer is the metal block of fan -shaped structure, is equipped with the wire fixed orifices in the main aspects of fixer, be equipped with the spring between fixer downside and recess bottom, the right side wall of the main aspects of fixer is including the external circular arc surfaces and the 2nd external circular arc surfaces that set up from top to bottom, being equipped with two rows of warning lights at the upper surface of box, being equipped with the conducting block in the both sides of apron, two conducting blocks pass through the connection of electric lines, and the conducting block contacts with the contact that corresponds when the apron is putd aside from the fixer directly over completely, and battery, warning light, conducting block, contact and electric wire have constituted alert circuit at this moment. The wire operation of flare -outing of can being convenient for of this instrument is avoided tripping the people and is led to the fact the injury.