Abstract: Insulation performance of sunlight greenhouse in winter is one of the main factors affecting farmer′s income.The most direct means of greenhouse production efficiency are increasing greenhouse heat preservation performance and reducing energy consumption.Taking Yanqing county of Beijing city as an example，temperature was monitored of three types greenhouses including wall of greenhouse，wall brick package greenhouse and brick greenhouse.Insulation performance of these greenhouses was comparative analyzed.Technical improvement measures of greenhouse warming insulation effect were put forward.