Abstract: Using unmanned scientific and technological equipment to extinguishment forest fire can greatly improve efficiency and effectively avoid sacrifice, which is an important development direction. This paper puts forward the concept of "forest block" in the special environment of plateau, and tries to explore the method of forest fire fighting of UAV in the environment of plateau "forest block" through the experimental research and practical application of small UAV as firefighting equipment and technology, and sums up the water injection equivalent required to extinguish a cliff fire. The actual combat verification of Motuo "3.7" forest fire shows that small electric UAV is very safe and efficient in extinguishing "cliff fire" in plateau forest, which is worth studying and promoting.

Key words: cliff fires, flying fires, isolation zones, forest blocks