In order to acquire the permeability of quartz hybrid phenolic materials at different temperatures, the experimental device which was used for measurement in gas permeation process in quartz hybrid phenolic materials was developed, and a method based on Darcy′s law for measuring permeability of quartz hybrid phenolic materials was presented. Quartz hybrid phenolic materials at different pyrolysis temperatures were chosen as the research object, and the gas pressure between down and upper materials and the gas flow rate through the materials were obtained. The permeability of the materials was obtained according to Darcy′s law. The results show that the permeability of complex pore composites can be measured by this experimental device. As the results show, the permeability of the quartz hybrid phenolic material is positively correlated with the pyrolysis temperature. The higher the pyrolysis temperature is, the greater the permeability be. The permeability level is in 10-13 m² at 673 K pyrolysis temperature and in 10-12 m² at 873 K and 1 073 K pyrolysis temperature. Furthermore, permeability of quartz hybrid phenolic materials and pyrolysis temperature meet the formula K=9.5×10-15T-6.32×10-12. The experimental results have enriched the basic physical data of this kind of resin-based composite materials, and provided a basis for the analysis of material permeability and thermal mass diffusion characteristics.