Abstract: This paper based on 25 year's historical data, assessed agricultural modernization degree of major grain producing areas in 25 years by using Analytic Hierarchy Process (AHP method). In the process of calculating agricultural modernization level in major grain producing areas, this article took method of sub-regional, sub-index contrast, and always takes into account of past process and future development trends. The results show that the levels of agricultural development in grain production area reflects the overall condition of China's agricultural development to some extent. The level of agricultural modernization and economic development shows closely related, and the regional agricultural modernization presents imbalanced way of development. On factors that affect the level of modernization, different index play various role, but the future agricultural development trend will demonstrate its more emphasis on rural society, urban-rural integration and agricultural sustainable and so on.