Pole-mounted live hoisting device

The utility model discloses a pole-mounted live hoisting device which comprises a main support and an extension support rotatably arranged on the main support, and a rotatable main roller is arranged at one end, deviating from the main support, of the extension support; the lifting hook structure comprises a lifting hook frame, a lifting hook is arranged on the lower portion of the lifting hook frame, a driven roller is arranged in the middle of the lifting hook frame, and a lifting rope is further arranged on the lifting hook frame; one end of the lifting rope is arranged on the lifting hook frame, and the other end extends out of the slave roller and the master roller; a tightness-adjustable main locking chain is arranged on the upper portion of the main support, and a tightness-adjustable auxiliary locking chain is arranged on the lower portion of the main support. The device can adapt to cylinders with various outer diameters, is not limited by geographic positions and environmental factors when in use, c