The Soviet Union's "great cleansing" that shocked the world in the 1930s and the aftermath of other waves are still lingering in the countries of the former Soviet Union. The orphans of millions of victims of the "great cleansing" are always ups and downs at the thought of the injustice and tragic fate of their parents and grandparents, and they can't restrain their excitement for a long time. So far, the world public opinion circles are still discussing this incident endlessly. However, it was not until the 1980s, half a century later, that people still vaguely understood its historical truth, context and basic reasons: either they only knew the surface without knowing the inside, or they only glimpsed the tip of the iceberg without knowing the whole picture. In many books, many descriptions of the "great cleansing" movement are only based on some people's memories, and only fragments and local situations can be said in fragments; It is rare to describe the historical panorama of the "great cleansing", and it is rare to discuss and write books completely according to the literature.