A device for a strain clamp to pass through a paying-off tackle comprises a rotary drawing head, a crankshaft mechanism and a cable lug connector which are sequentially connected, wherein the crankshaft mechanism comprises a first main journal and a second main journal which are concentrically arranged, as well as an eccentric connecting rod neck eccentrically, upwardly and fixedly arranged between the first main journal and the second main journal; the first main journal is rotationally connected with the rotary drawing head; the wire nose connector comprises a hollow connecting rod in detachable connection with the second main journal, as well as a fin protection sleeve arranged on the hollow connecting rod in a protruding manner; and the protruding direction of the fin protection sleeve is consistent with the eccentric direction of the crankshaft mechanism. According to the device for the strain clamp to pass through the paying-off tackle, the crankshaft mechanism and the cable nose connector are arranged in a matched manner, the fin protection sleeve can automatically rotate around the main journal; when passing through the tackle, the fin protection sleeve automatically faces upwards, so that the strain clamp can pass through the tackle on good conditions; and the strain clamp can pass through the multi-base paying-off tackle and reaches an appointed mounting position, so that overhead crimping is omitted, and the construction efficiency is improved.