Abstract: 【Objective】 Effects of thermal insulation cover methods on internal temperature of Chinese solar greenhouse.This project established a model of the precise uncovering position of the insulation based on the demand of light at different locations inside the greenhouse. 【Method】 Proposes a new method of uncovering and covering the insulation on a time-by-time basis.At the same time, a computational fluid dynamics (CFD) transient model was used to analyze the change of air temperature inside the greenhouse under different uncovering methods in the Major Cold and spring equinox. 【Result】 In this project, the CFD model of Chinese solar greenhouse was established according to the greenhouse specification 1∶1, and the coefficient of determination of the established model was between 0.91-0.92.Two Solar Terms were selected for analysis, namely the cold and the equinox.When the light completely irradiated the wall, the time-by-time uncovering increases the internal temperature of the greenhouse by 0.03℃ and 2.49℃, respectively compared with the traditional one-time uncovering and covering; when the light completely irradiated the ground, the time-by-time uncovering and covering increases the temperature by 0.55℃ and 0.9℃, respectively compared with the traditional one-time uncovering and covering; when the light completely irradiated the crop layer, the time-by-time uncovering and covering increased the temperature by 0.53℃ and 0.62℃, respectively compared with the traditional one-time uncovering. 【Conclusion】 The increase in temperature of time by time uncovering and covering on the more severe cold days during the Major Cold period was not obvious, the maximum increase in the average temperature of the whole 0.56℃; around the vernal equinox time by time uncovering and covering way all day average temperature can be increased by a maximum of 2.49℃.In the cold season, the uncovering and covering methods have little effect on the temperature, and the opening angle of the insulation can be increased to obtain more solar radiation.In the spring equinox, the opening angle can be reduced to increase the temperature inside the greenhouse.