The utility model discloses a toper locking formula strain clamp convenient to maintain aims at providing one kind and not only installs, dismantles easy maintenance, and strain clamp stable in structure, can effectively solve because of taking place not hard uply between last drain part and the wire jumper drain part, and influence strain clamp's life, reduce the toper of service reliability's problem and lock formula strain clamp. It includes the fastener body and the drainage body, the fastener body links to each other with the wire, and the drainage body includes: the upper portion of going up drainage rod links to each other with the fastener body, and the lower terminal surface of going up drainage rod is equipped with the toper spliced eye, wire jumper drainage rod, wire jumper drainage rod's upper portion be equipped with with the toper spliced eye matched with toper stick of pegging graft, toper grafting stick is inserted and is established in the toper spliced eye, and the locking joint nut on wire jumper drainage rod is established to the cover. In upward drainage rod's lower extreme stretches into the locking joint nut, pass through threaded connection between locking joint nut and the last drainage rod.