Lanling County, belonging to Linyi City of Shandong Province, is located in the southwest of Shandong Province, bordering Luozhuang District of Linyi City and Tancheng County in the east; Zhuangwu, the Great Wall and Moshan in the southeast are connected with Tancheng County; South of Nanqiao Town, Lanling town, Changcheng town and Jiangsu Province Pizhou city adjacent; In the west, Xiacun, Lucheng, Xinxing and Lanling are adjacent to Zaozhuang. In the north, Xiamcun, Chewang, Dazhong Village and Fei County border; The northeast mine, Zhong village, sacred Mountain and Luozhuang district depend on each other. The administrative area covers a total area of 1724 square kilometers. As of 2021, the permanent population of Lanling County was 1.459 million.

Lanling County was founded in the Spring and Autumn Period (770-476 BC) and was the earliest county and town in Shandong Province. It was originally the second Shiting of the State of Lu. In 380 BC, it was occupied by the State of Chu and established as Lanling County and Town. Anti - Japanese War Lanling is a famous old revolutionary area. After the founding of New China, Lanling County was abolished. On January 8, 2014, the Ministry of Civil Affairs of China approved and approved Cangshan County to be renamed Lanling County. As of October 2021, Lanling County has jurisdiction over 2 subdistricts, 14 towns and 1 township, and the county people's government is stationed in the eastern section of Lanling Road in Lanling County.

In 2021, the GDP of Lanling County exceeded 30 billion yuan, reaching 31.68 billion yuan, with an average annual growth rate of 6.5%

On April 7, 2022, Lanling County was selected into the Shandong 2022 high standard farmland promotion model county list.