A device for grasping, felling and rotating trees for coupling and fastening to a machine, wherein the device is comprising four mechanisms fastened together, wherein the mechanisms are comprising a horizontal rotating mechanism, a vertical rotating mechanism, a top mechanism for grasping trees and a base mechanism for felling trees wherein a. said horizontal rotating mechanism being rotatable around a vertical articulation pin/roller and driven by two horizontal drive cylinders, and simultaneously turning the top mechanism for grasping the trees and the base mechanism for felling trees into a horizontal plane and a clockwise and anti-clockwise direction; b. said vertical rotating mechanism, being rotatable around a horizontal articulation pin/roller and driven by two vertical drive cylinders, and simultaneously turning the top mechanism for grasping the trees and the base mechanism for felling trees into a vertical plane and a clockwise and anti-clockwise direction; c. said top mechanism for grasping trees comprising: i) a central upper horizontal fork for buttressing and supporting the trees, including a "U"- like shape; ii) a top arm for left and upper grasping, a top arm for right and lower grasping, an intermediary arm for left and upper grasping and an intermediary arm for right and lower grasping; d. said base mechanism for felling trees comprising: i) a left cutting arm and a right cutting arm, respectively fasten, each said left arm and right arm pivotable by two pins, said pins vertical and parallel in relation to each other; ii) both said left arm and right arm respectively comprising an upper left cutting blade and a lower right cutting blade each cutting blade pivotable by the two pins, cross over each other overlappingly with the upper left cutting blade on the position above the lower right cutting blade; iii) two driving cylinders fastened by each of respective two forward pins and two rearward pins, respectively and simultaneously connected to the left cutting arm and to the right cutting arm and to a horizontal structure by the pin of a left cylinder and by the pin of a right cylinder; and wherein the horizontal structure being fastened to the top mechanism for grasping the trees and the vertical rotation mechanism. a. said horizontal rotating mechanism being rotatable around a vertical articulation pin/roller and driven by two horizontal drive cylinders, and simultaneously turning the top mechanism for grasping the trees and the base mechanism for felling trees into a horizontal plane and a clockwise and anti-clockwise direction; b. said vertical rotating mechanism, being rotatable around a horizontal articulation pin/roller and driven by two vertical drive cylinders, and simultaneously turning the top mechanism for grasping the trees and the base mechanism for felling trees into a vertical plane and a clockwise and anti-clockwise direction; c. said top mechanism for grasping trees comprising: i) a central upper horizontal fork for buttressing and supporting the trees, including a "U"- like shape; ii) a top arm for left and upper grasping, a top arm for right and lower grasping, an intermediary arm for left and upper grasping and an intermediary arm for right and lower grasping; i) a central upper horizontal fork for buttressing and supporting the trees, including a "U"- like shape; ii) a top arm for left and upper grasping, a top arm for right and lower grasping, an intermediary arm for left and upper grasping and an intermediary arm for right and lower grasping; d. said base mechanism for felling trees comprising: i) a left cutting arm and a right cutting arm, respectively fasten, each said left arm and right arm pivotable by two pins, said pins vertical and parallel in relation to each other; ii) both said left arm and right arm respectively comprising an upper left cutting blade and a lower right cutting blade each cutting blade pivotable by the two pins, cross over each other overlappingly with the upper left cutting blade on the position above the lower right cutting blade; iii) two driving cylinders fastened by each of respective two forward pins and two rearward pins, respectively and simultaneously connected to the left cutting arm and to the right cutting arm and to a horizontal structure by the pin of a left cylinder and by the pin of a right cylinder; and i) a left cutting arm and a right cutting arm, respectively fasten, each said left arm and right arm pivotable by two pins, said pins vertical and parallel in relation to each other; ii) both said left arm and right arm respectively comprising an upper left cutting blade and a lower right cutting blade each cutting blade pivotable by the two pins, cross over each other overlappingly with the upper left cutting blade on the position above the lower right cutting blade; iii) two driving cylinders fastened by each of respective two forward pins and two rearward pins, respectively and simultaneously connected to the left cutting arm and to the right cutting arm and to a horizontal structure by the pin of a left cylinder and by the pin of a right cylinder; and