County economy is an important component of China’s national economy, and its development helps promote new urbanization and narrow the urban-rural economic gap. Liaoning Province relies on developing its county-level economy to promote industrial upgrading, poverty alleviation, rural revitalization and social development. In recent years, the development level of the county economy in Liaoning Province has significantly improved, but there are still problems, such as uneven economic development. Studying the development path of the county-level economy in Liaoning Province has practical significance. Based on the background of the new normal of China’s economy, this article analyzes the current development status, influencing factors and problems and challenges faced by the county-level economy in Liaoning Province and proposes countermeasures and suggestions for further promoting the development of the county-level economy.