This paper studies the problem of fault-tolerant control, based on state estimation and fault reconstruction, for a class of switched nonlinear systems with actuator faults. Under the switching signal with average dwell time(ADT), a switched PI observer which can asymptotically estimate the system states and faults simultaneously is developed. Then, the sufficient conditions of the existence of the switched PI observer are provided via linear matrix inequalities(LMIs). Moreover, a fault-tolerant controller is constructed by using the estimated state and fault information offered by the PI observer. Finally, an electronic circuit system is used as a simulation example to show that both the proposed observer and controller have satisfying performances.