A comprehensive understanding of the spatial characteristics of differences in agricultural high-quality development in major grain production areas will provide useful inspiration for promoting the coordinated development of high-quality agriculture in major grain production areas. Starting from the new development concept, this paper constructs a comprehensive evaluation index system for agricultural high-quality development, uses the entropy method with time variables to measure the agricultural high-quality development level of my country''s main grain producing areas from 2003 to 2018, and uses the Dagum Gini coefficient to reveal the regional differences in its development. Size and its source, and use a variety of convergence methods to investigate its convergence characteristics. The results show that: The level of high-quality agricultural development in the main grain producing areas is relatively low, showing an overall upward trend in fluctuations. There are significant regional differences in the high-quality development of agriculture in the main grain producing areas, and their differences show an overall downward trend in fluctuations. Regional differences and inter-regional differences alternately become the main source of regional differences. The high-quality development of agriculture in the main grain producing areas has typicalconvergence andconvergence characteristics, and the convergence by region and period has obvious characteristics of heterogeneity. In order to improve the level of high-quality agricultural development and narrow the regional gap, it is necessary to further deepen the structural reforms on the agricultural supply side, actively develop new agricultural formats and new models, and adopt the "catch-up effect" and "high-band low" pulling mechanism. Promote the cross-regional synergistic improvement of the high-quality agricultural development in the main grain producing areas.