Abstract: The concept of switched systems is introduced into distributed parameter systems,and a distributed parameter switched system is presented.Models of two classes of distributed parameter switched systems are set up through combining the modelling methods of switched systems with those of the distributed parameter systems.By means of the stability analysis on switched systems,the stability of two classes of distributed parameter switched systems is analyzed,and the sufficient conditions of exponential stability are given.Simulation examples are given to(illustrate) the validity of the theorem.