Adesign scheme of thedual piezoelectric stack driven actuator is proposed, in which the actuator is driven by two piezoelectric stacks of different sizes and connected by a sleevein the middle.To describe the hysteresis characteristics of actuators at different frequencies, the asymmetric Maxwell model, system dynamics equation and firstorder inertia link under quasistatic state are used to establish mathematical models, and the parameter identification, model simulation and experimental research are carried out.The simulation and experimental results show that the output displacement can reach 37.1 μm when the two piezoelectric stacks with a length of not more than 20 mm are driven simultaneously by the excitation voltage signals of 140 V and 600 Hz. Compared with the displacement at 140 V and 1 Hz, only 7.1% of the displacement has been attenuated. The proposed displacement amplification mechanism has better high frequency performance over other displacement amplification mechanisms. The established actuatorratedependent hysteresis model has a maximum amplitude error of no more than 1.71 μm and a root mean square error of 1.34 μm in 600 Hz, which can accurately describe the displacement output characteristics of the actuator and provide a basis for highprecision control of the actuator.