The invention discloses a rapid high-frequency voltage amplifier, which mainly comprises a voltage isolation module, a signal operation module, a signal amplification module and a power supply module.The signal operation module is used for calculating and setting an input signal and can be used for operating various input voltage signals. The voltage isolation module mainly achieves voltage isolation between input and output, input and output isolation voltage can be 3000Vdc through the voltage isolation module, and the requirements of most industrial places can be met. The signal amplification module converts the signal calculated by the signal operation module to realize a signal amplification function. Amplification processing of any voltage signal within +/-13V can be realized throughthe amplifier, the current of the signal is basically not required, the amplified signal can directly drive a motor, and the amplifier is particularly suitable for a strong electromagnetic interference environment, and the defect that a small signal is easily interfered by electromagnetic interference is avoided.