人工智能技术在地理教育中的应用普遍受制于AI幻觉，其导致的知识输出失真使AI教学效果不佳。本研究以“问题识别—技术突破—实践验证—效果评估”为逻辑，基于检索增强生成技术建构大运河主题式AI学习平台，切实纾解AI幻觉问题，形成“教师主导、AI辅助”的协同教学方式。本研究依据南京外国语学校高一地理课堂的三次实践数据，发现学生对平台中的创意创作模块满意度较高，预习支持效果显著，这在一定程度上肯定了AI学习平台的育人成效。

The application of artificial intelligence technology in geography education is generally constrained by AI illusion, which leads to distorted knowledge output and poor teaching eff ect of AI. This study follows the logic of“problem identifi cation - technological breakthrough - practical verifi cation - eff ect evaluation”, and builds an AI learning platform themed on the Grand Canal based on retrieval enhancement generation technology, eff ectively alleviating the problem of AI illusion and forming a collaborative teaching method of“teacher-led and AI-assisted”. Based on three practical data from the fi rst-year geography class of Nanjing Foreign Language School, this article fi nds that students are highly satisfi ed with the creative creation module in the platform, and the previewing support eff ect is signifi cant. To a certain extent, this affi rms the educational eff ectiveness of the AI learning platform.