Abstract: One-dimensional normal cloud is a very important cloud model with general applicability.To improve the theoretical foundation of cloud model,deeper and more thorough research on the properties of one-dimensional normal cloud is conducted based on the theory of probability statistics,and the normal cloud is visualized firstly from different angles.In addition,the reasons that the original algorithm of backward one-dimensional normal cloud has so many errors are statistically formulated,and a new and more precise algorithm for backward one-dimensional normal cloud is constructed.