The invention relates to a wiring tool for mutual inductor detection, which comprises an insulated long tube and a metal clip installed at the top portion of the long tube; the metal clip is connected with a detection extending line; the metal clip comprises a fixed clamping plate and a movable clamping plate slidingly connected with the fixed clamping plate; the movable clamping plate is connected with a stay rope that pulls the movable clamping plate to enable the movable clamping plate to be separated from the fixed clamping plate, and a metal clip return spring that drives the movable clamping plate to get closed with the fixed clamping plate; the stay rope passes through the long tube and the bottom of the long tube has a pull-down drive mechanism connected to the bottom end of the stay rope; the pull-down drive mechanism comprises a tooth bar vertically installed inside the long tube in a sliding way, a tooth bar dial-down mechanism that is installed on the long tube and cooperates with the teeth of the tooth bar to dial the tooth bar for downward movement, and a tooth bar positioning mechanism that is installed on the long tube and cooperates with the teeth of the tooth bar to lock the position of the tooth bar; and a tooth bar return spring is connected between the bottom end of the tooth bar and the bottom wall of the long tube. The wiring tool has the advantages of simple structure, convenient operation and safe and reliable usage.