It is known that the target echoes extraction is difficult under the intense reverberation interference for deep-sea mining environment.So a new simulation method of bottom reverberation environment is proposed and the reverberation interference of AR model in the simulation environment of mining is set up based on this simulation method.Then the signal's Itakura distance is calculated under the simulation environment by using the AR model.The bottom reverberation simulation model is established which is based on the AR model and Itakura distance.Then signals with different Itakura distance are detected using the pre-whiten processing

as well as a lot of experimental data of known Itakura distance.The processing results of simulation and experimental data show the reverberation under the simulated mining environment has local stationary.