This paper,might provide some,perhaps fragmental,knowledge about the relation of soil (including paleosol) on the loess plateau to environmental variations.The authors are tryinh to enter into the nature and speciality of the loess deposition and loess layer and then annalyze the bidogy-climate information possibly contained in the soil characteristics.This approach might alleviate the antagonism and hence promote the cooperation between different scientific views.The authors suggests that:(1) Patieular settling modes let to particular mother material for the pedogenesis.It is just the prolonged falling accumulation and continuous alternative pedogenesis-lithificatioa of this material of "parasoil-pseudosoil" along the middle reach of the Yellow River that formed the loeaspaleosol sequence as thick as 200 meters.