In response to the challenges posed by the Ψ-type gyroscope oscillator, an anchor-free metal oscillator is optimized and improved. Using the finite element simulation, the vibration characteristics of the oscillator are analyzed in depth, and the oscillator modes and natural frequencies of each order are obtained. The overload characteristics of the oscillator are simulated and analyzed, and the stress and displacement performance of the oscillator under high overload conditions are obtained. The quality factor of the oscillator is further analyzed by multi-physical field. The results show that the metal oscillator has a diameter of 15 mm, a natural frequency of 12518 Hz, a modal isolation of more than 3324 Hz, and can withstand an overload impact of no less than 3.8×10^4 g, while the quality factor reaches 8.7×10^4.