The study of global food history is flourishing, and there are currently two writing paradigms and two research orientations. Sorting out its path and methods centered on the “three staple crops” （maize, sweet potatoes, and potatoes) has demonstrative value. After the Age of Discovery, the “three staple crops” quickly spread globally, providing an excellent entry point to understand the formation of globalization and the modern world. Studying how the “three staple crops” spread in the process of globalization and how they promoted it is of great significance for us to understand the process of globalization and modernization. The history of the “three staple crops” entering China reflects not only the exchange between Chinese and Western cultures, but also the mutual learning of civilizations, recording the historical sites of coexistence, sharing, and prosperity between the East and the West. The “three staple crops” should be regarded as a whole for analogical analysis and pattern summarization; through the perspective of crop landscape, the traditional single narrative of global history can be broken, and the integration of internal and external history can be achieved under the research logic of promoting localization, technological localization, and cultural localization.