Historically, lankao county once belonged to Kaifeng and Shangqiu. At present, lankao county has fully implemented the system of directly administering counties, and the administrative divisions are still under the original Kaifeng City.

1June, 954, parts of Lanfeng County and Kaocheng County merged. lankao county was named after the initials of the two counties, and the county seat was located in the original Lanfeng County. Belongs to Kaifeng area.

1April, 955, Kaifeng area was renamed Kaifeng area.

1977 10, lankao county is classified as Shangqiu area.

1August, 980, lankao county was assigned to Kaifeng.

Lankao, a county directly under the jurisdiction of Henan Province, belongs to Kaifeng City, Henan Province, the birthplace of Jiao spirit, the sub-central city of urban positioning area, the famous red cultural city of China, and the emerging strategic fulcrum of the Central Plains Economic Zone. It is located at the last bend of the Jiuqu Yellow River, in the center of Zhengzhou, Heze and Shangqiu. It is an important gateway from Henan to southwestern Shandong and an important part of the "half-hour traffic circle" in Henan Province.