红外探测微型杜瓦是一种能满足红外光敏元件在低温及真空环境下有效工作的重要装置。杜瓦的绝热性能直接关系到红外探测元件的工作温度和工作时间，这也是杜瓦性能的主要考核指标。这种微型杜瓦的制造材料是添加了一层铝箔的环氧玻璃钢。实验测定了这种环氧玻璃钢材料的导热系数， 以及实验研究了铝箔添加层的厚度与所处位置对导热系数的影响。 Infrared Detection Micro-Dewar is an important device to meet the infrared light-sensitive components in the low-temperature and vacuum environment, an important device to work effectively. Dewar’s thermal insulation performance is directly related to the working temperature and working time of the infrared detection element, which is also the main evaluation index of Dewar performance. This miniature dewar is made of epoxy glass reinforced with a layer of aluminum foil. The thermal conductivity of this epoxy FRP material was experimentally determined, and the influence of the thickness of the aluminum foil additive layer and the location on the thermal conductivity was experimentally studied.