Abstract: Traditional multi-loop angular-rate detection methods cannot meet the need for wide range angular rate detection of metal shell vibratory gyro. A new method was proposed based on adaptive sliding mode controller to detect wide range angular rate signal. Analyzing the dynamic equation of typical metal shell resonator, a state equation was established involving disturbance and perturbation parameter. Getting proportion integral sliding mode surface with exponential approach law, a kind of sliding mode controller was designed for metal shell vibratory gyro to effectively estimate the wide range angular rate. The simulation and experiments results prove that the detection method can steadily control the metal shell resonator's mode shape and effectively measure the wide range angular rate. It is adapt to the wide range of environmental applications for metal shell vibratory gyro.