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Aiming at the problem that traditional handmade multi-layer insulation blankets cannot meet the high production efficiency and consistency requirements of small satellite batch production, an intelligent projection assisted tailoring system for multi-layer insulation blankets based on vision sensing technology is established. The system mainly consists of projector, camera and control software. Through depth camera, projector and system calibration, the projector image coordinate system can be aligned with the workpiece coordinate system to ensure 1:1 positioning projection of multi-layer process drawings. The system can be used to guide multi-layer insulation blankets cutting, Velcro and polyimide pin installation work. The experiment and application prove that the system projection ratio and positioning error meet the design requirements, and can significantly improve the efficiency and consistency of multi-layer insulation blankets, and establish a database of general product multi-layer insulation blankets process information to realize the accumulation of process knowledge and rapid call.