The wood grabber effectively solves the safety of manual loading and unloading and transportation and the low efficiency of manual loading and unloading during felling in forest areas. The problems of low efficiency and high cost caused by the uncoordinated man-machine matching in many occasions such as industrial mechanized production. The truck-mounted sling clamp has many functions, wide uses, saves labor costs, and improves work efficiency. There are not only truck-mounted cranes that hold bricks and hold bricks, but also truck-mounted cranes that grab wood, scrap iron, and bamboo. These multi-functional models are all It can be listed normally, and there is no need to worry about the problem of the traffic police on the road. Grasping wood, scrap iron and bamboo cranes mainly rely on special clamps for work. The clamps are installed at the hooks and controlled by hydraulic power. The clamps can be rotated 360 degrees, and the working angle is flexible and very convenient to use.