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It is imperative to adopt the rotation modulation technology of error self-compensation if the navigation accuracy of the Jet-link inertial navigation system is further improved on the basis of the existing fiber gyroscope accuracy.Continuous rotational alignment is an effective technical means for optical fiber gyroscope inertial navigation system to achieve high-precision alignment.To realize high-precision Single-axial Rotating FOG-SINS,a type of low -power, low-cost, middle-precision rotation mechanism design scheme for Single-axial rotating navigation system is put forward. The ideal effect of the general reciprocating rotational motion is that the rotating mechanism rotates at a uniform speed around the reference angle of the carrier coordinate system.The heading decoupling and reciprocating rotation mode is a two-vector superposition of heading tracking motion and reciprocating rotational motion.The design scheme of the rotating mechanism integrates electronics, automatic control, software and machinery, the inertial measurement unit in the inertial navigation is placed on the rotating mechanism, the DC motor is rotated by the gearbox bearing drive rotating mechanism, and the angle position is uploaded by the gonimetric device, and the rotating mechanism drives the inertial measurement unit to rotate and position at a set rate and rotation mode. Through theory analysis, design and experimental verification ,the rotating control mechanism has good control precision and good reliability, which meets the demands for developing middle & high-precision FOG-SINS.