Strand pulling machine

The utility model provides a strand pulling machine relating to a construction machinery of the prestress, which comprises a machine frame, a steel strand propulsion system, a power source and a transmitting unit. The machine frame is an entire frame structure; four supporting feet with screw thread are arranged under the machine frame; the height of each supporting foot can be regulated by rotating a nut of each supporting foot. The power source is composed of a three-speed electrode changing motor which can provide three positive rotation speed, one reverse rotation speed and a stopping and brake function and an electric cabinet. The transmitting unit comprises a speed changer, a belt, two belt pulleys and the steel strand propulsion system. The height of the steel strand outlet of the strand pulling machine can be adjusted by regulating the height of the supporting feet, and therefore, the requirement that the steel strand outlet directly faces to the space of a preformed hole when the strand is pulled can be achieved accurately with beautiful appearance and easy construction. The steel strand can be propelled in three speed, the starting is smooth, the speed change is reliable, and the strand pulling machine has three positive rotation speed, one reverse rotation speed and a stopping and brake function, which satisfies the different needs of the construction.