The air-film reinforced concrete spherical silo (hereinafter referred to as the air-film spherical silo) is a new type of storage structure. In order to explore the effect of the air-film spherical silo in a storage period, this paper takes the first air-film spherical silo in China as a research object and the wheat grain pile as the research target to reproduce the distribution of temperature field cloud map in the radial and vertical plane of wheat in the storage period by numerical fitting. Results showed that the air-film spherical silo had the characteristics of low silo temperature and average grain temperature. A huge and stable “cold core” formed inside the grain pile, effectively inhibiting the reproduction of pests. Therefore, the grains can safely pass the summer without the use of chemical fumigation in a whole grain storage period, which has a positive effect on promoting the development of low-temperature green grain storage technology.