The grain production transformation is the core content of the evolution of the rural production system. The breakthrough of grain production transformation research can clearly reflect the evolution of regional rural man-land interactions, and provide a new perspective for deepening urban-rural integration and rural transformation. Based on the analysis of grain production transformation since China's reform and opening-up, this paper attempts to construct an analytical framework for China's grain production transformation. We identified four stages in transformation process of grain production, namely, grain as the key link, gricultural restructuring, comprehensive transformation and urban-rural integration. Using GL-RL model, the analytical framework of China's grain production transformation was constructed. It was found that the grain production evolved from "Green Loop" stage to "Red Loop" stage, which was gradually integrated from rural local production network into urban-rural production network. In addition, the disturbance factors driving the grain production transformation have multiple spatial-temporal features and cross-scale effects. Factors such as urban-rural integration development, rural vitalization strategy, rural man-land interactions, and globalization will have an important impact on future grain production transformation. Furthermore, optimizing the relationship between grain production and rural transformation provides guarantees for safeguarding the orderly transformation of grain production, and improving the conditions for creating the rural production system.