早在２０世纪３０～４０年代，李四光就已开始对我国长江中下游第四纪冰川发育问题进行研究。本文通过对长江中下游在冰期时的古气候、山体高度及雪线高度的研究，认为气候变冷和高山存在是长江中下游第四纪冰川发育最关键的条件。尤其是后者对发育冰川起着积极和直接的作用。 As early as the 30s and 40s of the 20th century, Li Siguang began to study the development of Quaternary glaciers in the middle and lower reaches of the Yangtze River in China. Based on the paleoclimate, the height of the mountain and the height of the snow line during the glacial period in the middle and lower reaches of the Yangtze River, this paper argues that the existence of climatic cooling and high mountains is the most critical condition for the development of Quaternary glaciers in the middle and lower reaches of the Yangtze River. In particular, the latter play a positive and direct role in the development of glaciers.