Analysing the development trend and control mode of international grain merchants in the new period has the important guiding significance for cultivating local transnational grain merchants and ensuring our country's grain security. With the change of macro environment, the international big grain merchants show three development trends: diversification of business scope, diversification of main body types, and emergence of new grain merchants. The control mode is constantly adjusted and improved, which could control both front-end grain sources and back-end food. Not the key nodes, but also the industrial chain were also controlled. Control is based on the present, but also leads the future. The internationalization road of domestic grain merchants is still in the initial stage, so we should fully learn from the successful development experience of international grain merchants, which could improve our own control, and serve the domestic work of grain supply and market stability.