Under the background of great changes that have not occurred in the world in a century, to accelerate the pace of socialist modernization with Chinese characteristics and realize the great rejuvenation of the Chinese nation, it is particularly necessary to find confidence and wisdom from the long-standing agricultural civilization, promote the creative transformation and innovative development of agricultural civilization, and provide strong support for accelerating agricultural and rural modernization and achieving the overall goal of Rural Revitalization. Chinese civilization is rooted in agricultural civilization. Agriculture, as the primary industry on which the Chinese nation depends for its emergence, reproduction and development, has derived a brilliant agricultural culture in the long historical process, and formed an agricultural thought with land ethics and grain ethics as the core. This not only has a profound impact on people's thinking habits and behavior, but also provides a historical mirror and cultural code for solving some real social problems. Traditional land ethics and grain ethics are a series of basic norms for the development and utilization of nature formed around agricultural production, which can be summarized as the relationship between people and land and the attitude of people towards food. It mainly includes people's attitude towards land reclamation, utilization and protection, as well as the production, storage and use of grain. Among them, land ethics contains the initial relationship and way of living between people and land, as well as the basic concepts such as the unity of heaven and man, the harmony of all things, the rational use, and the coexistence and common prosperity. Under the control of land ethics, a set of grain ethics, such as attaching importance to farming and cherishing grain, has been formed, which is the core content and fundamental embodiment of agricultural ideology and culture. Under the guidance of agricultural ideology and culture, China's agriculture has experienced primitive agriculture, traditional agriculture and modern agriculture, and is moving towards modern agriculture step by step. Remoulding land ethics and grain ethics can provide ideas and Enlightenment for solving practical social problems. Nowadays, the traditional mode of agricultural social development has been violently impacted, and the sequelae brought about by the extensive economic development has gradually emerged, which is manifested as: People's attitude towards land has become cold and single, and the phenomenon of seeking quick success and instant benefits such as "going up the mountain and down the Beach" and "abandoning the farmland" and one-sided pursuit of short-term benefits have repeatedly occurred. The emergence of these problems is related to the loss of excellent traditional farming ideas. Building a new land ethics and food ethics system will provide an ethical perspective for solving major practical problems such as land protection and food security, and answering the difficult problem of "who will farm and how to farm". The construction of land ethics and grain ethics is a complex system project, which mainly includes: the restoration and promotion of the agricultural humanistic spirit centered on cherishing the land and loving the grain and the agricultural production tradition centered on fine cultivation; The construction and improvement of the agricultural ethics of the new type of human land relationship based on protection, utilization and development; The construction of agricultural ecological civilization with the comprehensive management of mountains, forests, fields, lakes, grass and sand as the basic content; The innovation and development of agricultural production mode with the modernization of agricultural science and technology as the core; The cultivation of diversified land values and grain values and the construction of new advantages of modern agricultural civilization; The establishment of a multi-level land sustainable use and food security production and management guarantee system; wait. The basic path to achieve the above-mentioned goals includes the following aspects: improving the current level of agriculture through science and technology