The North Jiangsu Main Irrigation Canal (simplified Chinese: 苏北灌溉总渠; traditional Chinese: 蘇北灌溉總渠; pinyin: Sūběi Guàngài Zǒng Qú) (often called the Subei Canal) is located in the lower reaches of the Huai River, one of the major rivers in the north of Jiangsu Province, China.

After the Chinese Civil War, the government wanted to rebuild the canal for flood management.

However, Premier Zhou Enlai, who came from the Huai River drainage basin, insisted on carrying out the whole project because he knew how people suffered from flood and waterlogging in his hometown.

Chairman Mao Zedong and Premier Zhou Enlai instructed relevant departments to work out a plan to regulate water conservancy.

Li Baohua, undersecretary of Ministry of Water Resources, reported the researches of his group and proposed a project plan.

In Gaoliangjian, on the northern canal, and Buning hydroelectric power generators and ship locks have been built near sluices.

[citation needed] This is a further flood drainage gate that strengthens the draining capacity of the main canal.

The Jiangsu Irrigation Canal Management Office (江苏省灌溉总渠管理处) is in charge of the administration of riverine engineering and the provision of resources.