[Objective] The coordinated development among the unique ecology, economy, and society of the Loess Plateau was studied to guide the sustainable development of the Loess Plateau.[Methods] The study used data from the typical areas of in Loess Plateau of Changwu County, Suide County, Shenmu City, and Chunhua County from 2001 to 2019 to investigate the ecological, economic, and social development of the area. The coupled coordination degree model and the scissors difference method were used to study the coordinated development trend of the ecology-economy-society system.[Results] The comprehensive evaluation index of the ecosystem for the typical areas of the Loess Plateau fluctuated and increased, the comprehensive evaluation index of the economic system and the social system increased steadily, and the degree of ecological-economic-social coupling and coordination continued to increase. The scissors difference between the ecological and economic systems, and between the ecological and social systems decreased over time, reflecting continuous improvement in the relationships between the ecological, economic, and social systems in the region, and indicating coordinated development. The impact of the economic and social systems on the ecological environment weakened year by year.[Conclusion] Ecological and economic systems, and ecological and social systems of southern border area of the Loess Plateau were in a stage of coordinated development. However, the ecological environment is still an important factor restricting local development. Stabilizing and developing the ecological civilization construction in this region and alleviating the competition between the economy and the ecosystem, and between society and the ecosystem are still important issues that need to be faced for the sustainable development of the Loess Plateau.