Food security constitutes the core of national strategy, and geography serves as a vital carrier for food security education. Taking the grain high-yield practice in Yili Prefecture, Xinjiang as a case, this paper integrates food security education into the senior high school geography teaching of“Agricultural Location Factors and Their Changes”. It designs a task-driven “Geography Detective” classroom teaching model to guide students to understand the logic of agricultural location optimization and its great significance for consolidating food security. The case teaching aims to promote the development of students’geographical key competences, deepen their understanding of the strategies of“storing grain in the land and storing grain in technology,” and provide practical references for integrating national strategic education into senior high school geography teaching.