Abstract: Based on the Double Cantilever Beam (DCB) testing method, an experimental and analytical investigation was conducted on the modeⅠinterlaminar toughness and fracture behavior of woven fabric reinforced laminates. DCB tests were completed at both room temperature (R T) and liquid nitrogen temperature (77K) to evaluate the influence of temperature and specimen size on the interlaminar fracture toughness. The broken areas were examined by scanning microscope to analyze and identify the fracture characteristics.