The invention relates to a steel strand penetrating device for large steel structure traction equipment. The steel strand penetrating device is characterized by comprising a fixed mount, a fixed clamping mechanism, a movable clamping control mechanism, servo drive oil cylinders and an anchorage device, wherein a strand penetrating through hole is formed in a frame body at one side of the fixed mount; the upper end and the lower end of the frame body at the side are fixedly provided with servo drive oil cylinders; piston rods of the servo drive oil cylinders are connected to the anchorage device arranged in the fixed mount; the fixed clamping mechanism is mounted on the fixed mount; the movable clamping control mechanism is mounted on the anchorage device; and a strand guide plate is fixedly arranged on the inner side surface of a frame body at the other side of the fixed mount. The steel strand penetrating device has the advantages that: automatic penetrating function of single steel strand and a plurality of steel strands can be realized, and the state that all steel strands are uniform in stress can be reached. The device is simple and convenient to operate, so that on the premise of guaranteeing safety and reliability, the construction speed and the engineering quality of an offshore oil platform are improved, and the engineering construction progress is quickened.