The battle of Ertaierzhuang cannot be separated from the name of General Li Zongren. Li Zongren is an outstanding strategist in our country. At the beginning of the Anti-Japanese War, he was ordered to be the commander of the Fifth Theater. Sitting in Xuzhou, commanding the defensive war on the Jin-Pu line. The troops he led in five war zones, except the No.1 1 1 and No.21in Guangxi, were all transferred from various war zones, including the Central Army and the "miscellaneous army", with complicated factions and many problems. Li Zongren knows how to be good at people's duties, understands the great sense of righteousness, moves with emotion, unites his subordinates, and Qi Xin resists Japan. His combat deployment is thorough, firm and calm, and his command is decisive. Sun's army was good at defense, and he entrusted Taierzhuang to carry out positional warfare, while Tang's army was good at attacking, making it carry out mobile warfare on Taierzhuang's side. In the southern section of Jin-Pu line, 5 1 Army and 59 Army fought positional warfare on the north bank of Huaihe River, while Guangxi 3 1 Army and 7 Army made way for the front line of Jin-Pu line. The whole division retreated to the west, launched guerrilla warfare, launched the people's armed forces of Huai River and Huai River, and cooperated with the army and the people to wipe out the enemy together, so that the Japanese army could not stop reinforcing Taierzhuang on the south bank of Huaihe River. Li Zongren's new strategy and tactics of combining mobile warfare with positional warfare and guerrilla warfare have achieved great results in Taierzhuang Campaign. Li Zongren's correct command is one of the important reasons for the victory of Taierzhuang Campaign.