The utility model discloses a detachable skeleton of preparation fiber optic?gyroscope ring, including two at least big sliders, two at least little sliders and two price fixings that have centre of a circle hole, plane of price fixing is smooth, and centre of a circle hole periphery is equipped with two annular groove on the another one plane, is excircle recess and interior round recess respectively, big slider and little slider are the arc, all are equipped with the outward flange on its arc outside, and the edge all is equipped with the inward flange in its arc, a plurality of curved big sliders and little slider distribute in turn and constitute the cylinder, during cylinder both ends outward flange and inward flange block excircle recess and interior round recess corresponding on two price fixings respectively, form the detachable skeleton of I shape. Little slider and little around ring contacting optical fiber area, small?friction, the utility model discloses can dismantle the price fixing then dismantle little slider earlier not damaging under the winding optic fibre circumstances, the skeleton is dismantled the most at last, its simple structure, cost low cost.