The Jin Dynasty was finally overthrown by the Mongols.

Genghis Khan died in 1227, and was officially succeeded by his third son Ogedai in 1229, who was Taizong of the Yuan Dynasty. After that, Mongolia once again dealt with the Jin Dynasty. In 1230, Ogedai Khan launched a three-pronged attack on the Jin Dynasty. Ogedai Khan led his army across the Yellow River to directly attack Bianjing. Chen Nayan led the east route army to Jinan, and his fourth brother Tuo Lei led the west route. The Route Army borrowed the Song Road from Hanzhong to attack Bianjing along the Han River. In 1232, Toilei succeeded in making a detour to Bianjing. The Jin Ai sect sent Wanyan Heda and Yilapua to lead an army to stop the attack in Dengzhou. At this time, Wokuotai Khan led his army across the river and sent Subotai to attack Bianjing. Wanyan Heda hurriedly led his army to the north to aid Bianjing, and had an encounter with the Mongolian army led by Tuo Lei at Sanfeng Mountain (now southeast of Yuzhou City, Henan). The elite Jin army was defeated. The famous generals Zhang Hui and Wanyan Heda , Monk Wanyan Chen and Yilapua died in battle and were captured and killed. The Mongolian army besieged Bianjing, forcing Jin Aizong to sue for peace. Then Jinting killed the Mongolian envoy, and the Mongols besieged Bianjing again.

Jin Aizong insisted on abandoning Bianjing until the end of the year and fled south to De (now Shangqiu City, Henan). Cui Li, the defender of Bianjing, surrendered to Mongolia. Mongolian general Shi Tianze pursued him all the way, and Jin Aizong fled to Caizhou. The Mongolian army invited Song generals Meng Gong and Jiang Hai to lead a joint siege. In the first month of 1234, Caizhou was in danger. Jin Aizong did not want to be the king of subjugation, so he passed the throne to the commander-in-chief Wanyan Chenglin, who became the last emperor of Jin. At this time, the city of Caizhou fell, Jin Aizong committed suicide, the last emperor died in the rebellion, and the Jin Dynasty fell.