In this paper, we investigate the event-triggered $$H_\infty $$ H∞ controller synthesis issue for vehicle suspension systems with linear fractional uncertainties. An active suspension model of quarter-car is represented by the state-space form. In order to obtain a resource-aware state feedback controller for the system, we propose an event-triggered communication mechanism to check which measurements should be delivered to the controller for updating the control input. Together with the proposed event threshold condition, a piecewise continuous bounded function is introduced to model the intermittent updating intervals. Employing the Lyapunov functional method, we present a stability criterion for the controlled event-triggered active suspension system under parameter uncertainties and some physical constraints. Then, a design method for the event-triggered controller gain is obtained by utilizing some matrix transformations. An example is finally employed to illustrate the validness of the proposed method.