A hypothesis of “snowball Earth” is a hotspot in the study of international paleoclimate. The simulation of snowball earth is significant for understanding modern climate and predicting future climate, while, the simulation and study using EMIC on which are very little in China.. This program will carry on simulations of snowball earth mainly from three aspects. We will study the climate characteristics of the snowball earth in the Neoproterozoic as well as the critical conditions (solar constant and carbon dioxide concentration in the atmosphere) of snowball earth initiation and deglaciation based on numerical simulation, statistical analysis and dynamic diagnose firstly. The probable cause of the climate change in the Neoproterozoic will also be illustrated in this part. Secondly we will compare and analyze the effects of different land cover and ocean heat transport on Neoproterozoic earth climate, the probable mechanism of which will be revealed by dynamic diagnose and simulation data analysis in this program. Finally, the effects of continental ice sheet on the initiation and deglaciation of snowball earth during Neoproterozoic are investigated in order to find their relationship. In this part we will discuss the importance of the continental ice sheet to earth climate. . The work in this respect has great instructive significance and actual value for the understanding of climate change, modern climate formation, natural geographical environment evolution, division and correlation of stratum, as well as the origin and detection of mineral resources. It will provide a new idea for the research on earth climate change. The work is also significant for better understanding the formation and evolution of ancient earth climate. In addition, to clarify the cause of typical icehouse during this period has some reference value to the current man-made greenhouse.