The resonance frequency of the piezoelectric resonator will drift due to environmental factors. The tuning technology actively adjusts the resonance frequency by using specific means, which has a wide range of applications. Traditional mechanical tuning techniques such as additional masses attachment and laser ablation are time-consuming and labor-intensive, and have poor flexibility. For the cuboid piezoelectric resonator, an electrical tuning method of excitation signal amplitude tuning and DC tuning is proposed. This method can precisely adjust the resonance frequency of the resonator. A digital measurement and control circuit based on ZYNQ is designed, which realizes the frequency sweep excitation of the vibrator. The circuit also detects the amplitude and phase of the output signal, providing an experimental hardware platform for the excitation signal amplitude tuning and DC tuning. The experimental results show that the resonance frequency adjustment range of excitation signal amplitude tuning is about 347.850~348.000 kHz, and the adjustment range of DC tuning is about 347.720~347.820 kHz. This technology provides a reliable theoretical and practical approach for the precise adjustment of the resonance frequency of piezoelectric resonators.