In order to simulate seafloor reverberation time series in the case of monostatic, the mixed model method is presented, using the point-scatterer model method and the patch-scatterer model method alternately. This method can not only overcome computational errors caused by the Gaussian distribution assumption in the patch-scatterer model method, but also decrease computational complexities of the point-scatterer model method. In order to simulate narrowband reverberation time series easily, the simulation method designed based on simulating reverberation complex envelop, which is feasible for any sampling frequency. Finally, the validity of the simulation method is verified by the simulation test.