EROWA flexible tooling has outstanding advantages in clamping because of its high flexibility, high precision and high efficiency. Because of its high precision, weak rigidity, miniaturization and complex structure, the key structural parts of inertial platform have higher requirements for precision manufacturing technology. Based on flexible tooling technology, the design and application of EROWA flexible tooling in the manufacturing process of inertial platform were described. This technology is of great significance in the process of variable mass production of equipment.