Due to the lack of industry standards of CT detection for solid rocket motors, a standard sample motor was made by using positive density material blocks to simulate the debonding defects and alloy blocks to simulate the defects inside grain. The CT comparison tests were carried out between a standard sample motor and an actual motor, and the actual motor was dissection and sampled for verification. It is shown that results of motor CT detection are consistent with that of radiographic and dissection tests, and design of the standard sample motor meets the requirements of research. The minimum detection ability of industrial CT system is determined: debonding area is 20mm×20mm, width is 0.4mm, diameter of voids and inclusions is 5mm, and width of cracks is 0.4mm. The CT detection standard is established and the CT detection process for solid rocket motors is normalized accordingly.