Global warming is one of the hot topics today, and the understanding of past
global climate change, especially the past climate change is the key to predicting future
global change. China's research on loess, lake sediments, ice cores, marine sediments
and other information carriers has achieved a lot of results. This paper summarizes
the previous studies on the basis of previous studies. Revelation of paleoclimate, global
change process and revealing of laws provide a reference.