High-level branch pruning saw, referred to as high-level chain saw, is one of the common garden machinery for pruning trees in landscaping. This is a machine that is difficult and dangerous for a single person to operate. Suitable for forest fire fighting, urban landscaping, expressway and lawn flower beds; It can be seen from the pruning names of agricultural orchards, streets, hospitals, schools, villas, parks, etc. High-branch chain saws are mainly used to trim some taller branches, so compared with other chain saws, high-branch chain saws are more dangerous to use. Therefore, how to use chain saw correctly is not only an important technology of garden pruning technology, but also a guarantee of personal safety. When using high-branch chain saw to trim, you should cut the mouth first, and then cut the upper mouth, so as to avoid the sawing phenomenon; For some larger kinds of miscellaneous branches, the method of subsection cutting can be adopted. When operating a high-branch chain saw. Manipulation is also important. Hold the operating handle tightly with your right hand, naturally hold the handle with your left hand, and keep your arm as straight as possible. The angle between the high branch chain saw and the ground should not exceed 60 degrees, and of course the angle should not be too small, otherwise it will be very dangerous and difficult to operate.