Song Wu is an important figure in Shi Naian's classic Water Margin.

It also appeared in Jin Ping Mei, because it ranked second, also called Wu Erlang.

In order to avoid being arrested by the government, he disguised himself as a monk, and people in the Jianghu called him Monkey Song Wu.

Song Wu once killed a white-fronted tiger with his bare hands in Jingyanggang. He once got together with Lu, Yang Zhi and others in Erlongshan, Qingzhou. When the three mountains gathered together, they entered Liangshan and took the 14th place, becoming one of the top ten generals.

Later, he was recruited by the imperial court and conquered Liao, Qing and Fang La with Song Jiang. He was eventually injured by a flying knife in the process of conquering Fang La and lost his left arm. He was named the founder of Zhong Qing, and finally died in Liuhe Hall, Hangzhou, at the age of 80.

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After the whole Liangshan Group was pacified, it participated in the whole process of pacifying Liao, Wang Qing and Fang La.

In the decisive battle between Liao and Wu, he broke through Sun array, cut off the horse's head with one knife and killed it.

When Tian Hu was recruited, Shen An was hacked to death by Song Wu.

In the battle with Qiao Daoqing, Song Wu was captured alive and would rather die than surrender. Later, Jinding and Huang Yue surrendered, and Song Wu was saved.

When Fang La attacked the Soviet Union, Song Wu hacked to death three kings.

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When attacking Hangzhou, Song Wu saw that Deng was singled out, and the outcome was unpredictable, so he personally went into battle to support him. Deng saw the two men beating themselves and went back.

When chasing Deng, he hacked to death Bei Yingkui, one of the 24 generals in Hangzhou.