Rod string load upward-lifting device

The utility model relates to a rod string load upward-lifting device which is used for the jam releasing construction of a jammed rod string of a rod pumping well during the construction operation of the rod pumping well. The upward-lifting device comprises a barrel, wherein the upper end of the barrel is connected with an upper pressing cap; a spring, a tooth block and a pressing ring are arranged in the hole of the barrel; the pressing ring is arranged between the upper pressing cap and the internal shaft shoulder of the barrel; the lower end surface of the spring contacts with the tooth block; the upper end of the spring is positioned by the pressing ring. By the adoption of the upward-lifting device, not only is the damage to a rod elevator avoided, but also a safety accident occurring at the time when a broken end flies out with a square clamp after a rod is pulled to be broken can be effectively prevented; therefore, the safety of construction workers on the construction site is guaranteed, the potentia