Abstract: Taking the seafloor reverberation as a studied object,a method of simulating reverberation is proposed based on time-space discretization to increase the computing speed.The reverberation is the linear response of scatters to the emitting signal,and can be described by a linear network to obtain the impulse response function.By the time discretization of the impulse response function and regional division of the seafloor,the summation of scatters is translated into the total number of time slice,and the computing speed is increased.The results of numerical simulation show that the proposed method can effectively reduce the computational complexity,and the performance is well in agreement with the theoretical analysis.