The invention relates to an abrasion-proof tackle when cables pass through a wellhead. The abrasion-proof tackle comprises angle steel and fixed pulleys; the fixed pulleys are arranged at two ends of the angle steel respectively; the multiple fixed pulleys are mutually connected to the two ends of the angle steel to form a closed structure; one angle steel is arranged between every two fixed pulleys; and pulley shafts of the fixed pulleys are fixed on the right-angle edges of the angle steel. According to the abrasion-proof tackle, because the vertically-closed type fixed pulleys are arranged, when the cable pass through an upper wellhead and a lower wellhead of a cable well, the cable can steer around the fixed pulleys to move so that the cable can be prevented from directly making contact with the well wall, and therefore the abrasion of an insulation layer of the cable can be avoided.