In order to improve the damping effect of active suspension with electro hydrostatic actuator （EHA） under time-varying delay， an adaptive Smith feedback time delay control strategy is proposed. Firstly， an EHA active suspension model with time delay is established， the relation between controllable damping and critical delay is obtained by combining the theory of delay differential equation， and the influence of the critical delay on the dynamic characteristics of suspension system is analyzed. Secondly， the optimal feedback coefficient and time lag obtained by genetic algorithm are used as the compensation reference， and the adaptive Smith feedback time delay control is used to compensate the main force of time delay. Finally， the dynamic characteristics of the suspension under the control strategy are simulated， and the time-delay control bench test of the EHA active suspension is carried out. The results show that the dynamic characteristics of the suspension under the adaptive Smith feedback time delay control is reduced， which effectively reduces the influence of the time delay on the EHA active suspension.