草船借箭是中国古典名著《三国演义》中赤壁之战的一个故事。借箭由周瑜故意提出（限十天造十万支箭），机智的诸葛亮一眼识破是一条害人之计，却淡定表示“只需要三天”。后来，有鲁肃帮忙，诸葛亮再利用曹操多疑的性格，调了几条草船诱敌，终于“借”到了十万余支箭。
The Arrow from the Grass Boat is a story about the battle of Chibi in the classic Chinese classic “The Romance of Three Kingdoms”. The arrow was deliberately proposed by Zhou Yu (limited to 100,000 arrows in ten days). The witty Zhuge Liang saw that it was a detrimental trick at a glance, but calmly said that “it only takes three days.” Later, with the help of Lu Su, Zhuge Liang took advantage of Cao Cao’s suspicious character, adjusted a few straw boats to lure the enemy, and finally “borrowed” more than 100,000 arrows.
周瑜提出让诸葛亮在十日之内赶制十万支箭的要求，诸葛亮却出人意外地说：“曹操大军即日将至，若候十日，必误大事。”他表示：“只须三天的时间，就可以办完复命。”周瑜一听大喜，当即与诸葛亮立下了军令状。在周瑜看来，诸葛亮无论如何也不可能在三天之内造出十万枝箭，因此，诸葛亮必死无疑。
诸葛亮告辞以后，周瑜就让鲁肃到诸葛亮处查看动静，打探虚实。诸葛亮一见鲁肃就说：“三日之内如何能造出十万枝箭？还望子敬救我！”忠厚善良的鲁肃回答说：“你自取其祸，叫我如何救你？”诸葛亮说：“只望你借给我二十只船，每船配置三十名军士，船只全用青布为幔，各束草把千余个，分别竖在船的两舷。这一切，我自有妙用，到第三日包管会有十万支箭。但有一条，你千万不能让周瑜知道。如果他知道了，必定从中作梗，我的计划就很难实现了。”鲁肃虽然答应了诸葛亮的请求，但并不明白诸葛亮的意思。他见到周瑜后，不谈借船之事，只说诸葛亮并不准备造箭用的竹、翎毛、胶漆等物品。周瑜听罢也大惑不解。
诸葛亮向鲁肃借得船只、兵卒以后，按计划准备停当。第一天，不见诸葛亮有什么动静！第二天，仍然不见诸葛亮有什么动静！直到第三天夜里四更时分，他才秘密地将鲁肃请到船上，并告诉鲁肃要去取箭。鲁肃不解地问：“到何处去取？”诸葛亮回答道：“子敬不用问，前去便知。”鲁肃被弄得莫名其妙，只得陪伴着诸葛亮去看个究竟。
凌晨，浩浩江面雾气霏霏，漆黑一片。诸葛亮遂命用长索将二十只船连在一起，起锚向北岸曹军大营进发。时至五更，船队已接近曹操的水寨。这时，诸葛亮又教士卒将船只头西尾东一字摆开，横于曹军寨前。然后，他又命令士卒擂鼓呐喊，故意制造了一种击鼓进兵的声势。鲁肃见状，大惊失色，诸葛亮却心底坦然地告诉他说：“我料定，在这浓雾低垂的夜里，曹操决不敢毅然出战。你我尽可放心地饮酒取乐，等到大雾散尽，我们便回。”
曹操闻报后，果然担心重雾迷江，遭到埋伏，不肯轻易出战。他急调旱寨的弓弩手六千多人赶到江边，会同水军射手，共约一万多人，一齐向江中乱射，企图以此阻止击鼓叫阵的“孙刘联军”。一时间，箭如飞蝗，纷纷射在江心船上的草把和布幔之上。过些时间，诸葛亮又命令船队头东尾西，靠近水寨，并嘱加劲擂鼓呐喊。等到日出雾散，船上草把排满密密麻麻的箭枝。此时，诸葛亮才下令船队返回。还命令士卒齐声大喊：“谢曹丞相赐箭！”当曹操得知时，诸葛亮取箭船队因顺风顺水，已经离去20余里，曹军追之不及，曹操懊悔不已。
船队返营后，共得箭十几万枝，为时不过三天。鲁肃目睹其事，极称诸葛亮为“神人”。诸葛亮对鲁肃讲：自己不仅通天文，识地理，而且也知奇门，晓阴阳。更擅长行军作战中的布阵和兵势，在3天之前已料定必有大雾可以利用。他最后说：“我的性命系之于天，周公瑾岂能害我！”当周瑜得知这一切以后自叹不如。
Zhou Yu asked Zhuge Liang to produce 100,000 arrows within ten days, but Zhuge Liang said unexpectedly: “Cao Cao’s army is coming today. If you wait ten days, you will miss major events.” He said, “It only takes three. In just a few days, you can complete the reinstatement.” Zhou Yu immediately made a military order with Zhuge Liang as soon as he was overjoyed. In Zhou Yu’s view, it is impossible for Zhuge Liang to make a hundred thousand arrows within three days. Therefore, Zhuge Liang will undoubtedly die.
After Zhuge Liang left, Zhou Yu asked Lu Su to check the movement at Zhuge Liang’s place and inquire about the reality. When Zhuge Liang saw Lu Su, he said, “How can I make a hundred thousand arrows in three days? I hope my son will save me!” The loyal and kind Lu Su replied, “You take the trouble for yourself, how can I save you? Zhuge Liang said: “I just hope you will lend me twenty boats, each with 30 sergeants, all the boats are covered with blue cloth, and more than a thousand pieces of grass are erected on both sides of the boat. All this. I have my own magical use. By the third day, I will guarantee that there will be 100,000 arrows. But there is one, you must not let Zhou Yu know. If he knows, he must be obstructed, and my plan will be difficult to realize.” Lu Although Su agreed to Zhuge Liang’s request, he did not understand Zhuge Liang’s meaning. After seeing Zhou Yu, he didn’t talk about borrowing the boat. He only said that Zhuge Liang didn’t plan to make the bamboo, feathers, glue paint and other objects for making arrows. Zhou Yu was puzzled after hearing this.
After Zhuge Liang borrowed ships and soldiers from Lu Su, he prepared to stop as planned. Nothing happened to Zhuge Liang on the first day! The next day, there was still no movement from Zhuge Liang! It wasn’t until four hours later on the third day that he secretly invited Lu Su to the boat and told Lu Su to go get arrows. Lu Su asked inexplicably: “Where can I get it?” Zhuge Liang replied: “Zi Jing doesn’t need to ask, you will know when you go.” Lu Su was confused and had to accompany Zhuge Liang to see what happened.
In the early morning, the Haohao River was foggy and dark. Zhuge Liang then ordered the twenty boats to be connected with a long cable, and anchored to the Cao Jun camp on the north bank. By five shifts, the fleet was close to Cao Cao’s water village. At this time, the priest Zhuge Liang opened the ship’s head, west, tail and east, and crossed in front of Cao Junzhai. Then, he ordered the soldiers to beat the drums and shout, deliberately creating a momentum of drumming into the soldiers. Lu Su was shocked when he saw this, but Zhuge Liang told him frankly: “I’m sure Cao Cao will not dare to fight resolutely in this dense fog and low night. You and I can safely drink for fun, wait until the fog is thick. When it’s gone, we will return.”
After Cao Cao heard the report, he was really worried that he would be ambushed in the heavy fog and lost in the river, and he refused to go out easily. He hurriedly mobilized more than 6,000 crossbowmen from Hanzhai to the river. Together with the naval archers, a total of more than 10,000 people shot into the river indiscriminately in an attempt to stop the “Sun Liu coalition army” from drumming. For a time, arrows were like migratory locusts, shooting one after another on the handles and curtains of the Jiangxin boat. After some time, Zhuge Liang ordered the head of the fleet to move closer to the water village, and asked to beat the drums and shout more vigorously. When the fog cleared up at sunrise, the grass on the boat was filled with dense arrow sticks. At this time, Zhuge Liang ordered the fleet to return. He also ordered the soldiers to shout in unison: “Thank you, Prime Minister Cao, for giving the arrow!” When Cao Cao learned that, Zhuge Liang’s arrow fleet had left for more than 20 miles due to the smooth flow of the wind.
After the fleet returned to the camp, a total of hundreds of thousands of arrows were obtained, which lasted less than three days. Lu Su witnessed this and called Zhuge Liang a “man of god”. Zhuge Liang said to Lu Su: He not only knows astronomy and geography, but also knows strange things and knows yin and yang. He is more adept at the formation and strength of troops in marching operations, and it is expected that there must be heavy fog to be used 3 days ago. He finally said: “My life is tied to the sky, how can Zhou Gongjin harm me!” When Zhou Yu learned of all this, he sighed.