After the New Fourth Army withdrew from Jiangyan and handed over Jiangyan to Er Li, Han Deqin became angry. At this time, part of the Eighth Route Army also moved south to northern Jiangsu and eastern Anhui, forming a strategic posture of north-south pincer attack on Han Deqin with the New Fourth Army in Jiangbei. In order to survive, Han Deqin decided to restore the lost territory of Huangqiao first and eliminate the New Fourth Army in Jiangbei to save the crisis. Han Deqin mobilized more than 30,000 people from 26 regiments, including his elite main force, and divided his troops into three groups to press against the New Fourth Army. Its deployment is as follows: with Li Shouwei's 89th Army and Wengda's 6th Independent Brigade, direct descendants of Han Deqin's department, as the main force, attack the north and east of Huangqiao separately at Yingxi, Guxi, Zushi Temple, and Jiali (place name); with Li Mingyang, Li Changjiang, Chen Taiyun's department is on the right wing, and five security brigades are on the left wing. They attack west and south of Huangqiao respectively and cover the security of the two wings of the central route army. (However, because Er Li and Chen Taiyun had two ambitions in the battle center, only 15,000 people from the 89th Army of Han Delqin's headquarters actually participated in the battle.)

After the New Fourth Army withdrew from Jiangyan and handed it over to Er Li, Su Yu came in person Commanding the battle on the front line of Huangqiao, Chen Yi "oversaw the overall situation" at Yanxuzhuang, about 20 kilometers west of Huangqiao. The battle plan for the Battle of Huangqiao. Based on various interests between the other party and us, and various subjective and objective conditions, Su Yu conceived the following three plans: "First, when Han Deqin attacks Huangqiao, we use a main force to capture Hai'an. Second, when Han Deqin has not yet attacked Huangqiao, we use a main force to capture Hai'an." To attack us, first use one force to develop eastward, control the (south) Tongru (Gao), Hai (men), and Qi (east) counties, and create a situation of advancing north to Dongtai, and use the main force to defend the Huangqiao area. Rely on the basic point of Huangqiao with all our strength, adopt offensive defense, and annihilate the stubborn troops in front of our fortifications."

The New Fourth Army headquarters compared and discussed the above three plans. The advantages of the first plan are. : "We use our main force to attack Hai'an and Dongtai to take the initiative militarily, and it is beyond the enemy's expectation and it is easy to win." The disadvantage is: "If Han Deqin uses the main force to attack Huangqiao, and we use the main force to attack Haian, When the main force of the Korean army has not been wiped out, it will not be easy to capture Haian, because although Haian does not have as many forts as Weiyan, it is better equipped and has stronger fortifications than Jiangyan. If Haian cannot be attacked and the Huangqiao is lost, Not only will it affect our morale and increase the opponent's arrogance, but it will also have a very bad impact on the masses. The masses may think that the New Fourth Army is a guerrilla force that does not want base areas or rear areas. It cannot squat for long and can walk, which will make it more difficult to mobilize the masses in the future. "Our attack on Hai'an with the main force is a mobile warfare of a large corps. If we still adopt the guerrilla method and provoke the rear, it will be very dangerous."

Let's talk about the second plan, the advantage is that. : "If we advance eastward, we are absolutely sure of victory, because they have few troops there and their combat effectiveness is very weak. If we go eastward and fight them, we can achieve absolute victory by searching for things. We can quickly create a base area in the east to facilitate the fight with the periphery of Shanghai." Being connected with Jiangnan is a strategic victory; when we advance eastward, Han Deqin will use part of his force to deal with us, and he must also use part of his force to prevent us from advancing northward to Dongtai. This will disperse his force and prevent us from attacking. The line is wide, which is beneficial to our battle; regardless of the manpower and material resources, we can be quickly replenished; after creating a new area in the east, it can form a corner with the Huangqiao area in the west, echoing each other, more effectively containing the enemy, and gaining strategic advantages "But the disadvantage is: "If we advance eastward before Han Deqin goes south, we will suffer adverse effects politically; their troops in the east are the 1st Security Brigade and the 5th Security Brigade, not direct descendants of Han Deqin. After the Yingxi battle, , the First Bao Brigade sent representatives to contact us, willing to establish a united front with us. If we move eastward, they will definitely rely on Han Deqin to oppose us and hinder the development of our united front; I will send a unit to move eastward and will If the troops at Huangqiao are reduced, then Huangqiao may not be able to be defended; if we send troops eastwards, we can certainly contain and disperse Han's forces, but if he is determined to abandon the east and concentrate his forces to attack Huangqiao, he will not be able to defend Huangqiao after it is captured. It would be disadvantageous for me to go back to the east."

Therefore, due to the comparison of interests, the New Fourth Army did not adopt the first or second plan.

At 11:30 on the 5th, Su Yu ordered the entire third column to attack. Under the all-out attack of the New Fourth Army, the 33rd Division of Han Deqin Army was shaken and retreated. Under the east-west assault of the New Fourth Army's second and third columns, most of it was wiped out. One part broke through to the northeast and retreated to Yewuji and Hejiatang. line, close to its military headquarters and the 117th Division. The first column of the New Fourth Army has advanced to the east and north of Nowuji and is fighting fiercely with Han Deqin's army. As of 5 p.m., Han Deqin's military headquarters and the 117th Division were still stationed in the villages near Nowuji, trying to wait for reinforcements or break out after dusk. At 9 o'clock in the evening, most of the main forces of Han Deqin's army had been eliminated by the New Fourth Army, and the entire battle could be said to be initially over.

Therefore, Su Yu immediately issued the following pursuit order: "(1) Situation (omitted) (2) All ministries should ignore fatigue, sacrifice at all costs, and not recapture, but pursue victory to occupy Hai'an. (3) The pursuit tasks and routes are divided as follows: (1) The first column starts from the current location (Yewuji) via Baziqiao and Guxi, to Yingxi and Sunjiazhuang, crosses the Yunyan River via Hujiaji, and attacks from the west of Hai'an to Hai'an. (2) The second column will attack from the current location (Hejiatang) via Taiping Bridge, Lujiaqiao, Xiaotatou Bridge, Huayuan Bridge, and Zushi Temple south of Guxi. (3) The third column will attack Hai'an from the south. The column passed from the current location (Dajiaozhuang) to the east of the Demarcation, Moving Channel, Jiali, and Huayuan Bridge, crossed the Yunyan River from the north of Chaiwan Town, passed through the Lifa Bridge, surrounded the northeast of Hai'an, and intercepted the stubborn troops of Hai'an heading to Dongtai. Retreat route. (4) Each department will send troops to clean up the battlefield and take care of the wounded. The majority of the main force should move forward quickly and arrive at Hai'an on the morning of October 6. (5) I will advance with the central column.

On the morning of October 5, 1940, the New Fourth Army captured a telegram from the 33rd Division of Han Deqin Army and learned that it requested the Korean Ministry to send the 701st Regiment of the 117th Division from Hai'an to quickly reinforce Huangqiao through the demarcation. Based on this telegram, Su Yu judged that the 701st Regiment of Han Deqin Army was still near Yingxi and there was a possibility of reinforcements to Huangqiao via the demarcation line. However, if the regiment learns that the 33rd Division has been eliminated, it is possible to retreat to Yingxi and Hai'an. Therefore, Su Yu ordered the pursuing troops to pay attention to annihilating the 701st Regiment outside Hai'an and prevent them from retreating to Hai'an, so as to facilitate the New Fourth Army's occupation of Hai'an. However, on the night of the 5th, the New Fourth Army troops were tired and the enemy retreating at Nowuji could not be completely eliminated. Therefore, the mission of occupying Hai'an on the morning of the 6th could not be achieved. At dawn on October 6, the pursuing troops split off from the Bazi Bridge, Yewuji, and Huangqiao areas to pursue Haian, and took advantage of the situation to annihilate the 89th Army Headquarters. Army Commander Li Shouwei fled in a panic and lost his footing in a dug trench. Seeing that the defeat was certain, Han Deqin led his remaining troops to flee towards Xinghua in despair. By the afternoon of the 6th, they had advanced to the vicinity of Yingxi, and the second column of the New Fourth Army came into contact with Han Deqin's army near Yingxi. The battle had not been resolved for three or four hours. Although the situation at this time is unclear, it is estimated that the unit must belong to the 701st Regiment. Therefore, Su Yu decided to use the second column to deal with the enemy in Yingxi with all his strength, and quickly dispatched the first column. Its vanguard troops crossed the Yanhe River from Hujiazhuang via Sunjiazhuang, aiming to capture Hai'an on the morning of October 7, 1940. The third column still pursued and advanced along the original route.

From October 3 to October 6, 1940, Su Yu commanded the New Fourth Army. After many battles, the army annihilated more than 11,000 people in Han Deqin's department. Eighty-nine The army commander Li Shouwei drowned. The commander of the 6th Independent Brigade Weng Da and several brigade and regimental commanders were killed. Sun Qiren, the commander of the 33rd Division, Miao Ruilin, the commander of the 99th Brigade, and the chief of staff of the 117th Division were captured. There were more than 30 division, brigade and regiment officers and 600 junior officers; more than 3,800 long and short guns, 189 light and heavy machine guns, 3 mountain guns, 59 mortars and a large amount of ammunition and military supplies were seized.