Good-stability pile casing driver of rotary drilling rig

The utility model discloses a pile casing driver with good stability for a rotary drilling rig, and belongs to the technical field of pile casing drivers. A pile casing driver of a rotary drilling rig with good stability comprises a supporting assembly, the supporting assembly comprises a first hinge seat, the supporting assembly can limit and support a pile casing driver body, the first hinge seat is detachably connected with a plate, and the side, away from the plate, of the first hinge seat is rotationally connected with a sleeve; the inner wall of the other end of the sleeve is slidably connected with an insertion rod, the inner wall of the other end of the sleeve is provided with a limiting groove matched with the insertion rod, the other end of the insertion rod is rotatably connected with a second hinge seat, the bottom end of the second hinge seat is fixedly connected with a base, and the inner wall of the base is in threaded connection with a screw. And the stability of the pile casing driver body in