Fiber optic gyroscope (FOG) is an important navigation device,and as its sensitive core element fiber optic ring (FOC) determines the accuracy and stability of FOG.During FOC winding process,extrusion deformation is likely to arise in the edge of the optical fiber turn,leading to winding defects such as overlapping yarn and collapse.To solve these problems and improve FOC winding efficiency,3D FOC simulation model was built,the SHUP effects of FOC with incomplete symmetry quadruple structure under different temperature load were analyzed,and the automatic edge control method of cross-layers was optimized.Finally,the effectiveness of the method was verified by actual winding experiments.