Rectangular air pipe hoisting device

The utility model relates to the technical field of hoisting equipment, in particular to a rectangular air duct hoisting device. The rectangular air pipe hoisting device comprises a winch, a first telescopic arm, a second telescopic arm, a third telescopic arm, a first closing piece and a second closing piece, a hoisting table is arranged on the first telescopic arm; one end of the second telescopic arm is vertically connected to one end of the first telescopic arm and is provided with a first locking piece; one end of the third telescopic arm is vertically connected to the other end of the first telescopic arm and is provided with a second locking piece; the first closing piece is rotationally connected with the other end of the second telescopic arm; the second closing piece is rotationally connected with the other end of the third telescopic arm and is detachably connected with the first closing piece; the first telescopic arm, the second telescopic arm, the third telescopic arm, the first closing piece an