This paper aims at deep learning of high school geography, constructs the teaching mode of "task chain and problem chain", and carries out the teaching design by taking the observation of the landforms of Bashi Peak in Yili Cha County as an example. Through the cognitive path of "climbing up to the top and overlooking the peaks and exploring the depth", students are guided to go through the whole process of identifying geomorphological features, reasoning about the causes and analyzing the relationship between people and land, so as to realize the development of deep cognition from perception to migration. In this paper, we also design a performance evaluation scale to ensure the consistency of teaching and assessment, and eff ectively enhance students' Geography Praxis and Holistic Thinking. This model provides an operational teaching design model for the in-depth learning of geomorphology content in senior high school geography.