Here the input-output finite-time stability for a class of stochastic distributed parameter switched systems is studied.First, the concept of the input-output finite-time stability of system in mean square sense is given.Second, by using the piecewise Lyapunov-Krasovskii function, average dwell time, linear matrix inequality and other tools, the sufficient conditions of input-output finite-time stability are constructed.In addition, a state feedback controller is designed to ensure the input-output finite-time stability of corresponding closed-loop system, which is proved by strict mathematical derivation.Finally, two simulation examples are given to verify the effectiveness of the results obtained.