The unsteady state was used to measure tubular gingko particleboard coefficient of heat conductivity.The authors found that the heat conductivity coefficient of the particleboard less than 0.233 W/（m·K）,met the requirements for construction insulating material.They also found during this study that an air space in the sandwich wall had a considerable effect in the heat-conducting property,that was,the larger the air space the better the heat insulation.The results showed that sandwich wall,which had a 23 mm air space,provided 3.21 and 1.77 times better heat insulation properties than a reinforced concrete wall and a porous brick wall,respectively.