Abstract: The Yangtze River Economic Belt plays a "major role" in supporting and serving Chinese path to modernization. High-quality of integrated agricultural development is the core content of promoting the development of the Yangtze River Economic Belt urban agglomeration. Based on the evaluation of the agricultural high-quality and integrated development index of the Yangtze River Economic Belt urban agglomeration from 2014 to 2021, using the entropy method and the relative price method, this study explored the coupling relationship and influencing factors, using the Dagum Gini coefficient, the coupling coordination degree model and Tobit model. The results showed that: (1) the level of high-quality agricultural development and the degree of agricultural integration were  not high, and the coupling relationship between the two was weak, which was regarded as at the  stage of imbalance; (2) The level of urbanization, economic development, agricultural contribution, and agricultural planting structure were the key obstacles that affected the coupling relationship; (3) The coupling relationship between high-quality agricultural development and agricultural integration demonstrated regional heterogeneity, with small regional differences.