The defense cost is extremely high, and the defense loss is huge. How can UAVs "defeat the big with the small"? Military experts often say that in the information age, the war has changed from "eating the small" to "eating the fast". However, with the rapid development and wide application of UAVs, especially small and micro UAVs, the unique operational advantages brought by "unmanned platforms" are transforming the rule of victory in war into "fast and slow" and "big snacks". "Scale imbalance confrontation" and "unequal value consumption" will become the new normal in the future battlefield. The advantages of UAV in "large number and difficult detection" can be realized in the operation. With the help of advanced communication and control technology, the combat forces can organize and use a large number of UAVs together according to different operational purposes and mission requirements, forming a complementary UAV combat group, effectively overcoming the limited capacity of a single platform, and realizing the overall capacity amplification, Achieve the effect of "1+1 ＞ 2". In combat, a large number of UAVs implement penetration or assault from multiple directions simultaneously in the form of program control or autonomous control, which can quickly achieve the destruction of important targets and key systems against the enemy, and ultimately consume the defense capability of the enemy with numerical superiority, causing the enemy to be unable to fight or defend in a passive situation. Hundreds of simulation tests conducted by the US Naval Graduate School show that at least 2.8 UAVs on average can avoid interception when attacking the world's most advanced Aegis shipborne air defense system in a group of 8 UAVs; In the case of system upgrade, at least one can break through. If the number of UAVs is increased to 10, 20 or more, the "Aegis" system can only intercept about 7 in front. As someone described the image of UAV cluster: facing hundreds of "little guys", "big guys" had to hide, and found that the situation was becoming more and more unfavorable to it - especially when it had to destroy thousands of "little guys" one by one to survive. What's more, small and micro UAVs can take advantage of low detectability to spread to the depth of the enemy through air drop or artillery fire, and then through self powered flight or ground maneuver, they can independently reach the target or directly attach to the key parts of large weapon systems, and even penetrate into the enemy's operational decision-making, command system and other internal core sites for reconnaissance and surveillance, Timely use the high explosives carried to destroy the key points and nodes of the target, or kill key and core personnel, and implement "endoscopic reconnaissance" and "minimally invasive strike". This attack mode can effectively destroy the enemy's operational system, disrupt the enemy's operational plan, disrupt the enemy's operational rhythm, and achieve the effect of "shifting the weight by four liang". In November 2017, a highly intelligent micro autonomous attack robot named "killer bee", which was announced at the United Nations Convention on Certain Conventional Weapons (CCW) Conference, is less than the size of an ordinary person's hand. It is equipped with wide-angle cameras, tactical sensors, facial recognition technology, etc., and is equipped with 3 grams of explosives. It can be used alone or in groups, and can fly into the room through a very small hole for accurate identification and attack. This may happen in the future battlefield. After the attack of UAV on the ammunition depot and command system, a large number of aircraft, tanks and ships will not receive command and ammunition