In this paper, an interferometric integrated optical gyro system based on silica waveguide interference ring is proposed and designed to realize the miniaturization and integration of interferometric integrated optical gyro. Firstly, the structure and cross section size of silica waveguide were determined, and the cross-section size was 4.5 μm×4.5 μm. Secondly, the bending radius of silica waveguide rings is determined to be 10 mm and the spacing between waveguide rings is determined to be 50 μm. Finally, the length of 2.434 m silica waveguide interference ring is fabricated. Meanwhile, an interferometric integrated optical gyroscope tst system was built using the silica waveguide ring, and the Allan variance of gyroscope was 110.5 (°)/h. The successful fabrication and testing of the waveguide ring is beneficial to reduce the volume of interferometric gyroscope and promote the engineering application of interferometric integrated optical gyro.