Clarifying the regional differences and dynamic evolution of food security levels is of great significance for actively implementing the government""s main responsibility and ensuring food security. By constructing a comprehensive evaluation index system for food security levels, this paper estimated and analyzed the regional differences and dynamic evolution of food security levels across various provinces from 2001 to 2022 by the Dagum Gini coefficient and the Moran""s I index. Results show that during the observed years, the food security level of the country shows an increasing trend and food production in most provinces not only meets the consumption needs of the region, but also contributes to others, with the highest level found in the main producing region, followed by the production and sales balance and the main sales area. Compared with food security under the greater food approach, the level of food security in the narrow sense is slightly lower. The relative difference is expanding in China, and the overall difference sources are mainly inter-regional differences, while the contribution rates of intra-regional differences still have a certain contribution rate. The level of food security shows a spatial feature of positive clustering, the high and low gathering areas are mainly respectively in the producing area, sales area and balance area. To establish a greater food approach and strengthen the policy impact of food security, this paper suggests: prioritizing the establishment of high-standard farmland, fostering a trend of provincial convergence, leveraging spatial dynamics to deepen interprovincial and regional collaboration in food security, harnessing complementary advantages, and continuously enhancing China""s level of food security.