Process thought is a rational understanding formed by people by exploring the relevant problems of geographical elements and the evolution process of geographical complexes. This article, based on the viewpoints of geographers on geographical processes, summarizes the key points of process thought-dynamic drive, process continuity, process rhythm, process stage, process unity and spatio-temporal synthesis. By adopting the special analysis method of middle school geography textbooks, it is found that the process thought of the People’s Education Edition Selective Compulsory Course 1 “Fundamentals of Physical Geography”is manifested in four aspects: with matter movement and energy exchange as the main line, the total-division-total structure is formed; pay attention to clarifying the dynamic conditions, action processes, results and effects of natural geographical processes; highlight the comprehensiveness of time and space that reflects the process of thought; the process idea is presented in the form of a combination of text, images and activity systems. Five teaching orientations have been summarized: connecting natural geographical processes with material movement and energy exchange as the main thread; Sort out the natural geographical processes in the form of“cause - process - result and impact”. Understand natural geographical processes by dividing scales from a comprehensive perspective of time and space; Dynamically present natural geographical processes in combination with information technology; Highlight the cultivation of students’core literacy in geography disciplines such as“comprehensive thinking”and“human-nature coordination concept”.