Optimal design of ring resonator in silica optical waveguide for Integration Optical Gyroscope (IOG) is presented by using Wide Angle Beam Propagation Method (WA-BPM). Furthermore, relationship among the finesse of ring resonator, the total loss and the power coupling ratio is analyzed. On the base of optimal design, we fabricated SiO2 optical waveguide ring resonator mixed Ge in Plasma Enhanced Chemical Vapor Deposition (PECVD) method. By testing at λ=1 550 nm, propagation loss and total loss of ring resonator are 0.02 dB/cm and 0.1 dB/circuit, respectively, which can offer academic reference for the integration optical gyroscope’s micromation and high precision.