The regionalizetion of comprehensive physical geography may be divided into two types in nature. One is knowability, and the other is applicability. The former possesses a strict system, which reflects correctly the regional variation. The aim of it is to systematize and theorize the regional data, and to promote the development of the science, The latter, according to the principle of regioal vaiation, reflects the relations between agricultural production and natural complex on the earth surface. Especially, it mainly discusses the agricultural harmful degree of flood, aridity, low temperature, strong wind and soil degeneration factors etc, and finds out the way of solving the factors. It provides basis of science for the development of agriculture production. The former has better scientific basis, and the latter has greater econmic significance.