Curing experiment was carried out on NOL rings of carbon fiber/epoxy composites by using the microwave curing technology. The mechanical properties and micro morphology of specimens with different curing methods, were analyzed.The results show that the curing mechanism of microwave curing method is different from that of thermal curing method.Microwave curing increases the curing reaction rate and shortens the curing cycle by 57%. The mechanical tensile strength and interlaminar shear strength of microwave curing specimens are similar to those of thermal cured specimens.Due to the selective heating of microwave curing, there is more resin matrix adhesion on the surface of the carbon fiber of the microwave-cured sample, which is confirmed by SEM micrographs.CT scan analysis indicates that the void content of the microwave-cured sample is 0.78% to 1.05%, which is slightly lower than the thermal-cured sample.