Disclosed in the invention is a lead alignment tool. A penetrating screw rod is in screw joint with the center of a lifting support plate; a handle is installed at the top of the screw rod in a two-side symmetrical mode; and a wire pressing plate is fixed at the lower end of the screw rod. A pair of symmetrical movable support plates are rotatedly installed at the two sides of the lifting support plate respectively by pin rolls; symmetrical U-shaped screw rods are fixed downwardly and respectively at the lower ends of the movable support plates; movable wire clamp plates are respectively installed at the U-shaped screw rods; and nuts are respectively connected to the U-shaped screw rods under the movable wire clamp plates by a screwed way. According to the invention, two ends of a bent lead can be clamped by the two U-shaped screw rods and the lead is supported and straightened by the wire pressing plate, thereby effectively avoiding a string scattering phenomenon and ensuring the construction quality; and the work efficiency is high.