Through the comparing experiments of three different type wall thickness and structure to warming performance of the cowshed,it could be seen that wall thickness was the greatest influencing factor on performance warming.When the outside temperature was -20 ℃,the lowest temperature in cowshed with walls thickness of 24 cm,37 cm and 50cm was -6.97,-2.03 and 5.57 ℃,respectively.The maximal temperature margin was 12.5 ℃,the impact of wall thickness to warming performance accounts for 59.78% of all factors.Type of shed roof was the second influencing factor,the maximal temperature margin was 5.67 ℃,the impact of this factor to warming performance accounts for 27.05% of all factors.Among which plastic film warming top（plus heat preservation layer at night） have the best warming effects.The impact of trial error was very small,only accounts for 3.96%.Using the analysis of variance,the impact of wall thickness to warming performance of cowshed is significant.