Grab wheel loader is used for loading and unloading wood, trimming, material selection, and on-site transportation; After replacing the working parts (such as replacing the jaw claws with buckets), it can also be used for building forest roads or transporting bulk materials on construction sites; After being replaced with a bulldozer shovel, it can be used for bulldozing operations. According to the different walking devices, wood loaders are divided into two types: track type and wheel type. Wheel type loaders generally use front and rear axle four-wheel drive, and the power is transmitted through a hydraulic torque converter, main drive shaft, and power shift gearbox to drive the front and rear axles, and then through a wheel side planetary gear reducer to drive the front and rear wheels. Fast driving speed, good maneuverability, and low impact vibration; But it has poor adaptability when working in muddy fields and is prone to slipping. The crawler loader adopts a crawler walking device. Its grounding ratio is small, the bearing capacity is large, and the stability performance is good; But the driving speed is slow, the maneuverability is poor, and it is easy to damage the road surface. It can be used for operations in rainy forest areas or swamp areas.