Abstract: The performance of heat preservation of wall was simulated and analyzed by the method of heat response factor and the model of thermal environment of sunlight greenhouse.The effects of heat preservation of different wall materials were compared through measuring the heat gained,temperature of wall and inner air temperature of greenhouse.The results show that the best thickness of polystyrene foam plastic among all the treatments is 0.10m;the effect of heat preservation of the thinner brick is better than that of the thicker brick with the same thick polystyrene foam plastic;if the brick is thinner,the arrangement of materials plays an important role in the performance of heat preservation of wall.