The invention discloses an unclosed type device for winding ropes on trees on
saline and alkaline land. The device comprises a base, a
metal flexible body is arranged on the base, a
metal flexible sliding rail is arranged on the
metal flexible body and is as long as the metal flexible body, a sliding base is arranged on the metal flexible sliding rail, a walking motor and a
rope guide tube are arranged on the sliding base, a plurality of friction structures are arranged on the inner wall of the
rope guide tube, a plurality of positioning pieces are arranged on the metal flexible body, and each positioning piece is a C-shaped elastic piece. The device also comprises a start key electrically connected with the walking motor and a power supply. When the device is in use, the base is placed near a tree, the metal flexible body is bent spirally upwards around the tree, and the metal flexible sliding rail on the metal flexible body is also bent along with the bending of the metal flexible body; to be noted, the metal flexible sliding rail is oriented to the tree. When the device is started, the sliding base moves on the metal flexible sliding rail, and then the
rope is wound on the tree through the rope
guide tube. Therefore, when the device is applied to the
saline and alkaline land, the work efficiency is improved.