In view of the wrong counting of original aerial reeling machine launcher’s counting structure in the air lead to the falling off of the tow target, modify counting system. The counting function is transformed from the counting pulley A of around cable path’s terminal to damping pulley B, so the inaccuracy because of the cable slip and occasion separation is avoided fundamentally. The results show that the consistency of around and return cable is good and the counting error is within allowable range and the accuracy of counting conforms with the application of the tow target system, after the aerial reeling machine launcher’s count structure is reformed.