The utility model discloses a novel mechanical arm which comprises a transmission arm, a grasper assembly and a driving mechanism for driving the grasper assembly to move up and down relative to the transmission arm, wherein the grasper assembly comprises a mounting seat and two grasping arms respectively arranged on the two sides of the mounting seat; first connection rods and second connection rods, which are parallel to each other and are staggered with each other in the height direction, are arranged between the grasping arms and the mounting seat; one ends of the first connection rods are hinged to the mounting seat, and the other ends of the first connection rods are hinged to the top ends of the grasping arms; the bottom ends of the grasping arms are provided with hook-shaped parts; one ends of the second connection rods are fixedly pivoted to gears on the mounting seat, and the other ends of the second connection rods are hinged to the grasping arms; the two gears are matched in a meshing manner; a tension spring is arranged between each first connection rod and the mounting seat; a driving assembly for driving one gear to rotate is arranged on the mounting seat. The novel mechanical arm disclosed by the utility model is simpler in structure and extremely convenient to use; meanwhile, when an object is grasped, the tension springs are used for pulling the grasping arms tight to tightly clamp the object and prevent the object from falling off.