To improve the resolving limit of a micromachined gyroscope, a sensing interface model for the micromachined gyroscope fabricated by Silicon on Insulator(SOI) process was established, and a matching front-end was designed. Firstly, a RC lumped parameter model for the gyroscope was established based on the practical gyroscope structure, then a noise model for the sensing interface was built. The dominant noise source and methods to improve the resolving limit were analyzed. Finally, on the foundation of a TIA front-end, an improved T-network front-end was designed to match the sensing interface. Experimental results indicate that the T-network front-end improves the sensing interface equivalent input noise current from 1.18 pA/√Hz to 0.27 pA/√Hz, corresponding to a capacitive resolution of 0.62 aF/√Hz as compared to those of the transimpedance front-end. It suggests that the improved T-network front-end can reach a better resolution.