This paper focuses on mixed event-triggered control of switched positive systems with saturated actuators under periodic Dos attacks. Firstly, for a class of switched positive systems with saturated actuators, by using the multilinear copositive Lyapunov function method, the sufficient conditions of the asymptotic stability of the closed-loop system with DOS attacks are derived under the variable period switched signal. Secondly, the mixed event-triggered mechanism is designed to save network resources. Due to the controller failure during the activating period, the mixed event-triggered condition is constructed to determine whether to sample the current state of the system and update the controller on the sleeping period. Finally, a simulation example of a turbofan engine model is given to verify the effectiveness of the proposed method.