Abstract: In order to fully understand the curing properties of composites, on the basis of the numerical simulation and analysis for the curing induced deformation of carbon fiber reinforced resin matrix composites, self-designed fiber Bragg grating (FBG) sensors were embedded in the composite to real time on-line monitor the temperature and strain evolutions during the curing process of composite. The stacking sequence of prepreg was 0₁₁/90₁₁. The FBG temperature and strain sensors were embedded in the typical positions of the laminate along 0° and 45° directions, respectively. The composite laminate was cured and molded by hot molded pressing method, and two continuous cooling stages were conducted on the laminate after molding. The changes for central wavelength of FBG sensors during the curing process are recorded in real-time. The results show that the absolute value of the composite compression strain at the first cooling early stage is obviously less than the absolute value of the compression strain at the second cooling early stage under the same temperature conditions, which indicates that the composite still proceeds the "post curing" reaction which can be detected by FBG sensors at the first cooling stage. Besides, the deformation monitoring data of FBG sensors for laminates match well with the finite element simulation results. Therefore, using the method of embedded FBG sensors can monitor the curing process of composites real-time, which provides a reliable and effective method for analyzing the curing characteristics of the composites more comprehensively.