Abstract: "Storing grain in the land" is the core food security strategy formed by the continuous optimization of the development needs of the times,and objectively analyzing its path dependence and defining the corresponding way of implementation are of positive and practical significance for implementing this strategy and ensuring food security of our country.The path dependence of China's goal of "storing grain in the land" is mainly manifested in four aspects:first,food security is the cornerstone of the overall national security,and "storing grain in the land" cannot be separated from the joint efforts of the whole society;second,it should be based on the improvement of the production capacity of existing cultivated land and focus on the quality construction of cultivated land;third,we should focus on global food security,and "storing grain in the land" needs overall planning at home and abroad;and fourth,conservation tillage is the inherent demand of "storing grain in the land",so the innovation of supporting system is of vital importance.For this purpose,this study puts forward the following ways of implementation:the first is to raise the public awareness of cultivated land protection and to form a social atmosphere in which the whole people contribute to "storing grain in the land";the second is to strictly prevent the "non-agricultural use" of cultivated land and ensure the red line of 1.8 billion mu (120 million hectares) of cultivated land;the third is to carry out comprehensive land renovation to promote the overall improvement of the quality of cultivated land in the region;the fourth is to improve the quality protection awareness of actual cultivators and strictly standardize farming behavior;the fifth is to strengthen the relevant system innovation to improve the effectiveness of the cultivated land quality construction project;and the sixth is to increase the research,development and application of conservation tillage technology to maintain a healthy cultivated land ecosystem.

Key words: "storing grain in the land", food security, cultivated land protection, path dependence